Wong v. Foster Farms CA1/2 ( 2022 )


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  • Filed 4/25/22 Wong v. Foster Farms CA1/2
    NOT TO BE PUBLISHED IN OFFICIAL REPORTS
    California Rules of Court, rule 8.1115(a), prohibits courts and parties from citing or relying on opinions not certified for
    publication or ordered published, except as specified by rule 8.1115(b). This opinion has not been certified for publication or
    ordered published for purposes of rule 8.1115.
    IN THE COURT OF APPEAL OF THE STATE OF CALIFORNIA
    FIRST APPELLATE DISTRICT
    DIVISION TWO
    SERENA WONG, et al.,
    Plaintiffs and Appellants,
    A161435
    v.
    FOSTER FARMS, LLC, et al.,                                             (Alameda County
    Super. Ct. No. RG17865531)
    Defendants and Respondents.
    Plaintiffs Serena Wong and Vicki Gruman appeal from an order
    denying class certification in an action they filed against defendants Foster
    Farms, LLC and Foster Poultry Farms for violations of state law, alleging
    those companies’ federally regulated poultry products are misleading and
    mislabeled due to the products containing an amount of retained water
    greater than that which is displayed on the products’ labels. Plaintiffs
    contend reversal is required for several reasons, including that the trial
    court’s ruling rests upon an improper merits determination and an erroneous
    factual assumption. We disagree and affirm the order denying class
    certification.
    1
    BACKGROUND
    An Overview of the Federal Law on Labeling Poultry Products
    Poultry labels are federally regulated under the Poultry Products
    Inspection Act (PPIA) (
    21 U.S.C. § 451
     et seq.), empowering the United
    States Secretary of Agriculture (USDA) to ensure that “poultry products . . .
    are . . . not adulterated, and properly marked[, and] labeled.” The USDA
    delegated authority to the Administration of Food and Inspection Service
    (FSIS) to oversee the labeling of poultry products. (
    9 C.F.R. § 300.2
    (a) &
    (b)(2).)
    During processing, recently slaughtered poultry carcasses are chilled to
    cool them down to a safe temperature. (
    9 C.F.R. §§ 381.65
    , 381.66.) An
    establishment must utilize poultry washing, chilling, and draining practices
    and procedures that will minimize water absorption and retention at the time
    of packaging. (Id., § 381.66, subd. (d)(1).) The water that is retained in raw
    poultry as an unavoidable consequence of post-evisceration processing used to
    meet applicable food safety requirements is referred to as “retained water.”
    (Id., § 441.10(a).) Raw poultry that retains water must bear a statement on
    the label stating the maximum percentage of water that may be retained
    (e.g., “up to X% retained water”). (See id., § 441.10(b).)
    In order to produce poultry products containing any amount of retained
    water, poultry producers like defendants must “maintain on file and make
    available to FSIS its written data-collection protocol,” which must explain
    how data will be collected and used to demonstrate the amount of retained
    water in the product. (
    9 C.F.R. § 441.10
    (c)(1).) FSIS reviews the protocol
    from the poultry producer and “may object to or require the establishment to
    make changes in the protocol” (id., § 441.10(c)(2)) if it finds “that the protocol
    is not valid, or that the data collected under it will not be sufficient to
    demonstrate that the amount of retained water is an unavoidable
    2
    consequence of the process used to meet food safety requirements.” (Retained
    Water in Raw Meat and Poultry Products; Poultry Chill Requirements,
    66 Fed.Reg. 1750, 1763 (Jan. 9, 2001).)[1]
    The federal regulations, however, do not dictate to poultry producers
    any particular data collection protocol to use. (66 Fed.Reg. at p. 1759.) Nor
    do they set a specific limit on the amount of retained water that is allowed.
    (Ibid.)
    The PPIA contains a preemption provision that preempts state law if
    (1) the state law imposes marking, labeling, packaging, or ingredient
    requirements, and (2) those requirements are “in addition to, or different
    than” the requirements imposed under federal law. (21 U.S.C § 467e.) Thus,
    any state may, consistent with the requirements of the PPIA and
    implementing regulations, exercise concurrent jurisdiction over products
    required to be inspected under the PPIA for the purpose of preventing the
    distribution of products that are “adulterated or misbranded.” (Ibid.)
    [1]The parties disagree on whether the FSIS “approves” a data
    collection protocol where, as here, it reviews an establishment’s protocol and
    does not object to it. As a practical matter, the FSIS has referred to its
    decision not to object to a protocol as an “approval” of that protocol. (See 66
    Fed.Reg. at p. 1751 [“Establishments would be required to collect data, in
    accordance with a protocol approved by FSIS, and demonstrate that water
    retention is an unavoidable consequence of the process used to meet a food
    safety requirement”], italics added; ibid. [“FSIS . . . would accept data
    generated from an approved protocol to support water retention levels”],
    italics added; accord, Webb v. Trader Joe’s Co. (9th Cir. 2021) 
    999 F.3d 1196
    ,
    1202 [“FSIS’s decision not to object or otherwise require changes operates as
    federal approval of that protocol”].) We defer to the FSIS’s interpretations of
    the PPIA and its implementing regulations. (See Pacific Bell Wireless, LLC
    v. Public Utilities Com. (2006) 
    140 Cal.App.4th 718
    , 729; Stinson v. United
    States (1993) 
    508 U.S. 36
    , 45.)
    3
    The Parties, the Pleadings, and the Demurrers
    Plaintiffs and appellants are Serena Wong and Vicki Gruman2
    (collectively, plaintiffs), California residents who purchased raw Foster
    Farms-branded poultry products. Defendants and respondents are Foster
    Poultry Farms, LLC and Foster Farms, LLC (collectively, defendants),
    companies that processed, packaged, labeled, and distributed poultry
    products.3
    In June 2017, the original complaint was filed, and one month later,
    the first amended complaint. It was a putative class action that alleged eight
    causes of action: (1) breach of the Consumer Legal Remedies Act (Civ. Code,
    § 1750 et seq.); (2) breach of the California Unfair Competition Law’s (UCL)
    prohibition on unfair business practices (Bus. & Prof. Code, § 17200 et seq.);
    (3) breach of the UCL’s prohibition on unlawful business practices (ibid.); (4)
    false advertising (id., § 17500); (5) breach of express warranty; (6) breach of
    implied warranties (Com. Code, § 2314); (7) theft by false pretenses; and (8)
    unjust enrichment. These causes of action were all centered around the
    theory that the Foster Farms-branded poultry products sold to plaintiffs were
    misleading and mislabeled because they contained a percentage of retained
    water greater than that which was displayed on the labels, according to
    plaintiffs’ own testing of the products.
    Defendants filed a demurrer primarily on the ground that plaintiffs’
    causes of action were preempted by the PPIA. In January 2018, then Judge
    Gruman was added as a plaintiff in the operative, fourth amended
    2
    complaint and prior to that, another plaintiff was dismissed.
    3Also named as defendants are Vons Companies, Inc.’s (Vons) and
    Ralphs Grocery Company’s (Ralphs), whose grocery stores were alleged to
    have sold Foster Farms-branded products to plaintiffs. Vons and Ralph’s are
    not parties to this appeal.
    4
    (now Justice) Ioana Petrou heard the demurrer. She found the first amended
    complaint alleged various theories as to how the chicken labels were
    inaccurate. Thus, it was “not entirely clear whether plaintiffs are alleging a
    claim that seeks to impose labeling requirements different from or additional
    to those imposed by the PPIA.” On that basis, Judge Petrou sustained the
    demurrer with leave to amend.
    In February 2018, plaintiffs filed a second amended complaint, after
    which defendants filed another demurrer on preemption grounds. Judge
    Petrou again found the allegations were “not clear . . . on what constitutes the
    wrong.” Plaintiffs alleged two “materially different theories: (1) that
    [defendants] mislabeled [their] chicken products because they contained more
    retained water at the time they were packaged than disclosed; and (2) that
    [their] chicken products violated labeling guidelines because the packaging
    contained more liquid at the time of consumption and testing by the Plaintiffs
    than was disclosed in the ‘retained water’ disclosure.” Judge Petrou found
    the second theory was preempted. That theory relied on the premise that
    “purge” or “weep”—the naturally occurring liquid that seeps out of a product
    after it is packaged and as it sits on the grocery shelf or in a customer’s
    refrigerator—should be counted as retained water. Because purge is not
    retained water within the meaning of the PPIA,4 Judge Petrou held that the
    second theory imposed a standard “in addition to, or different than” the
    federal statute and regulations. Judge Petrou sustained the demurrer with
    leave to amend to allow plaintiffs to clarify their theory of liability.
    4 (See FSIS’s “Compliance Guidelines for Retained Water” (June 2005),
    , Question No. 33, p. 13;
    FSIS, “Water in Meat and Poultry,”  [as of Mar. 17, 2022].)
    5
    Days after that ruling, plaintiffs filed a third amended complaint,
    which reasserted the same eight causes of action. Plaintiffs alleged they
    purchased defendants’ poultry products and had them tested, which testing
    revealed that, at the time of packaging, the products included significantly
    more retained water than declared on the labels. According to plaintiffs,
    defendants packaged their poultry products by placing superabsorbent pads
    underneath the product, allowing them to hide most of the excess retained
    water from the consumer. Thus, plaintiffs asserted “[t]he products are falsely
    labeled at the time [they] are packaged in [defendants’] facility because they
    do not accurately disclose the amount of water included in the products as
    retained water,” in violation of the PPIA “as well as California law.”
    Plaintiffs alleged they were harmed by paying more for economically
    adulterated and misbranded products.
    Defendants filed another demurrer, arguing that plaintiffs’
    methodologies for testing defendants’ products were not credible. Judge
    Petrou rejected this argument and overruled the demurrer. She found that
    plaintiffs “pleaded that [defendants] mislabeled [their] chicken products by
    packing them with more retained water than was disclosed on their labeling,
    in violation of the standards set by the PPIA and its implementing
    regulations.” That theory, Judge Petrou determined, “can support claim for
    relief.”
    In June 2019, the operative, fourth amended complaint was filed,
    adding Gruman as a plaintiff, but otherwise reasserting the same allegations
    and causes of action as the third amended complaint.
    The Motion for Class Certification
    On September 24, 2019, plaintiffs filed their motion for class
    6
    certification.5 Plaintiffs sought to certify a class and two subclasses of
    California consumers who purchased Foster Farms-branded poultry products
    during the class period.
    Under the heading “Summary of Facts and Common Proof” in their
    motion, plaintiffs stated that after they had purchased defendants’ products,
    they had those products tested and found that the products contained an
    unlawful excess of retained water. Plaintiffs offered evidence of their post-
    purchase testing as support of their claim.
    As material here, plaintiffs also argued that defendants’ own data
    produced in discovery “confirmed” the findings from plaintiffs’ own testing.
    In support, plaintiffs presented as their own evidence defendants’ “Moisture
    Gain Evaluation” for one of defendants’ processing facilities. Moisture gain
    data, plaintiffs described, “revealed bird weights before and after the poultry
    underwent the wet chilling process.” Because the moisture gain percentages
    were denoted in defendants’ documents as “% H2O retained,” plaintiffs and
    their expert Dr. Goedde assumed that the moisture gain percentages
    measured, and were equivalent to, the amount of retained water in
    defendants’ products. And because the “% H2O retained” numbers were
    higher than the percentages of retained water that were stated on the
    5 Plaintiffs also filed a motion to file under seal their class certification
    motion and several documents. The motion was granted, and plaintiffs filed
    under seal the certification motion and two exhibits attached to their
    attorney’s declaration: defendants’ sales data on poultry products and the
    report of plaintiffs’ damages expert, Dr. Alan Goedde, which referenced the
    sales data. Those documents were also filed under seal in this court. We
    have reviewed the publicly filed versions of the documents and have
    concluded that we do not need to use or rely upon the unredacted version of
    the documents filed under seal, with the exception of Dr. Goedde’s report,
    which we cite to without any specific detail.
    7
    products’ labels, plaintiffs argued that defendants falsified their product
    labels.
    Defendants filed an opposition to the motion, along with evidentiary
    objections to, and a motion to strike, Dr. Goedde’s report and opinions, among
    other evidence presented by plaintiffs. The opposition was accompanied by
    the declaration and report of Alling Yancy, DVM, their food safety and
    product regulatory compliance consultant, and the declaration of Casey
    Fripp, their Director of Food Safety and Quality Assurance. Fripp’s
    declaration in turn attached as exhibits defendants’ “Protocol for Evaluating
    Retained Water in Single Ingredient Poultry Product” they submitted to the
    FSIS in June 2015 and an August 2015 letter from the FSIS stating it had
    “no objection to the submitted protocol.”
    Defendants argued that plaintiffs failed “to show that they will be able
    to come forward with classwide evidence establishing the falsity of the
    retained water statement,” thereby “mak[ing] class treatment unsuitable.”
    Defendants asserted that plaintiffs’ evidence and expert opinions relied on
    certain measurements that they incorrectly assumed reflected the amount of
    retained water in defendants’ products. First, defendants and their expert
    Yancy explained that plaintiffs did not measure retained water during their
    post-purchase testing of defendants’ products because their measurements
    included purge. Defendants noted that Judge Petrou previously determined
    that any theory of liability that purported to count purge as retained water
    was preempted as a matter of law. As such, defendants argued that plaintiffs
    could no longer pursue such theory on class certification.
    Second, defendants argued that plaintiffs and their expert incorrectly
    assumed that defendants’ moisture gain data measured retained water. By
    way of background, Fripp explained in his declaration how defendants
    8
    measured and labeled the amount of retained water in their poultry products,
    an explanation supported by the following evidence which is not disputed.
    In June 2015, defendants submitted a data collection protocol to the
    FSIS for review. In August 2015, FSIS replied to defendants, stating it
    reviewed the protocol and had “no objection to [it].”
    Under that protocol, Fripp explained, defendants measured retained
    water using a chemical analysis referred to as “oven drying” testing. This
    test is a destructive test in that the poultry is destroyed during the process,
    and includes the following steps: “A. The carcass goes through the water
    immersion chilling process and is then allowed to hang and drip for six to
    eight minutes. The hang time of the carcass varies to account for the
    differing length of time it takes to process a carcass from the time it leaves
    the chiller until it is finally packaged on each individual line . . . [¶] B. After
    the hanging and dripping time is complete, the carcass is ground up and
    weighed. [¶] C. The ground up carcass is then heated until all moisture is
    eliminated, which basically turns the carcass into dust. [¶] D. The weight of
    the dry sample . . . is then compared to the weight of the sample before the
    oven drying to determine the percentage of moisture in the product. [¶]
    E. The percent of naturally occurring moisture published by the USDA for a
    whole raw chicken fryer, which is 66%, is then subtracted from the moisture
    derived from the oven drying test. [¶] F. The result is the percentage of
    retained water.”
    Next, Fripp stated that defendants calculate the percentage of moisture
    gain as a way to validate the measurement of retained water under the oven
    drying test through “check[ing] or verif[ying] . . . the day-to-day operations at
    the plant.” Chiller moisture gain percentage is derived from weighing a
    carcass before it enters the chiller and after the carcass exits the chiller and
    9
    is allowed to hang for the pre-determined processing time. The difference
    between the pre-chiller weight and the post-chiller weight, divided by the pre-
    chiller weight, equals the percentage of chiller moisture gain. Fripp stated,
    “By measuring the amount of chiller moisture gain, [defendants are] verifying
    that the processing of poultry is operating under the same conditions that
    were used to establish the retained water statement.” Fripp then clarified
    that under defendants’ protocol, moisture gain “is not a measurement of
    retained water.”
    Based on this evidence, defendants maintained that plaintiffs, in
    arguing that defendants should have used moisture gain to measure retained
    water, required defendants to conform to a data collection protocol different
    from the one they had properly developed for, and submitted to, the FSIS as
    required by federal law.
    Plaintiffs filed a reply, accompanied by the report of their “rebuttal
    expert” Marianne Delperdang, who opined that defendants’ moisture gain
    data “show[ed] the amount of retained water.” That data, she concluded,
    demonstrated that the percentage of retained water in defendants’ products
    exceeded that which was reflected in the labels.
    Defendants filed a sur-reply and a motion to strike Delperdang’s report.
    In their sur-reply, defendants asserted that “plaintiffs continue to insist on a
    different way to determine retained water (via moisture gain testing), which
    means they have (again) confirmed that they are attempting to impose non-
    identical requirements and, therefore, are pursuing a preempted theory of
    liability. Because oven-drying testing is the proper PPIA-compliant method
    to determine retained water—and because [defendants’] oven drying results
    confirm the challenged retained water label statements—plaintiffs have also
    failed to establish classwide evidence of deception.”
    10
    Before the August 18 hearing on the motion, Judge Brad Seligman
    issued a tentative ruling ordering that they be prepared to discuss the
    following issues at the hearing: “Plaintiffs’ papers are not clear on how,
    exactly, [defendants] violated the [PPIA] and federal retained water
    regulations. The Court sees three possible theories supported to different
    degrees by Plaintiffs’ evidence: (a) Did [defendants] err by failing to disclose
    the amount of liquid that would be in packaging at the point of sale or
    consumption? (b) Did [defendants] err by failing to disclose the amount of
    moisture gain as measured immediately after poultry carcasses are removed
    from an immersion chiller before further processing and packaging? (c) Did
    [defendants] err by failing to disclose the amount of retained water as
    determined under the oven-drying testing protocol it submitted to FSIS? Or
    (d) did [defendants] violate the PPIA and federal regulations in some other
    way not mentioned here?”
    At the August 18 hearing, Judge Seligman and plaintiffs’ counsel
    engaged in a lengthy discussion aimed at clarifying the theory of liability
    upon which plaintiffs sought class certification. Ultimately, Judge Seligman
    confirmed plaintiffs were asserting two bases for liability under the PPIA.
    Those theories were first, that defendants’ retained water label statements
    violated the PPIA because they did not “reflect [their] moisture gain
    measurements” (the “moisture gain theory”); and second that defendants’
    “protocol . . . itself creates a class certification issue because either they
    misrepresented something or they violated something in the [PPIA] in their
    own protocol” (the “protocol theory”).
    Judge Seligman then asked plaintiffs’ counsel to identify where in the
    record plaintiffs asserted the protocol theory. When counsel could not
    provide any supporting record citations, Judge Seligman gave plaintiffs one
    11
    week to file a statement showing “where in [their] papers [they] made those
    arguments and what evidentiary support there is.” 6
    One week later, plaintiffs filed a statement acknowledging that at the
    hearing, “they argued a theory of their case that the protocol submitted by
    the defendant[s] doesn’t comply with the PPIA and/or defendant’s [sic] did
    not follow the submitted protocol.” Plaintiffs then stated, “the Court was
    correct and no relevant page citations exist” in their certification papers
    concerning those theories. Plaintiffs, however, intended to file a motion for
    leave to amend their complaint to allege the new theories. Such motion was
    later filed.
    On September 14, Judge Seligman denied the motion for class
    certification by order. First, pointing to plaintiffs’ evidence based on their
    post-purchase laboratory testing and use of measurements that included
    purge, Judge Seligman stated “[p]laintiffs’ evidence of common issues of law
    and fact only relate to theories of liability that the Court has already twice
    considered and rejected” as preempted in the prior demurrer rulings.7
    6 Judge Seligman also explored whether it was necessary to hold an
    evidentiary hearing to address defendants’ challenges to the admissibility of
    Dr. Goedde’s and Delperdang’s reports and opinions expressed in them. The
    parties agreed that such a hearing was unnecessary. On the same day as the
    hearing, Judge Seligman granted defendants’ motion to strike and sustained
    their objections with respect to portions of Dr. Goedde’s report not at issue in
    this appeal. However, it does not appear that Judge Seligman ruled on the
    admissibility of other aspects of the report related to the issue of moisture
    gain. Likewise, the record does not show he ruled on defendants’ motion to
    strike portions of Delperdang’s report.
    7Plaintiffs state “that evidence is not at issue in [this] appeal.” We
    thus presume they no longer are pursuing the claim rejected by the court and
    consider it abandoned. (See Tiernan v. Trustees of Cal. State University &
    Colleges (1982) 
    33 Cal.3d 211
    , 216, fn. 4; Humes v. Margil Ventures, Inc.
    (1985) 
    174 Cal.App.3d 486
    , 493.)
    12
    Second, Judge Seligman determined that “Plaintiffs’ evidence that
    [defendants’] ‘chiller moisture gain’ measurements show higher amounts of
    water were retained by carcasses than was ultimately disclosed on packaging
    labels suffers a . . . deficiency because it does not distinguish between water
    retained by a carcass immediately after immersion and the amount of
    retained water in the final product after processing.” “Likewise, it does not
    tend to show that [defendants] failed either to file a compliant retained water
    protocol or to follow that protocol during data collection.” Instead, he
    concluded, “Plaintiffs’ evidence and expert opinions were directed toward
    proving theories of liability, then, that were not the causes of action pleaded
    in [their] operative Fourth Amended Complaint.”
    Judge Seligman continued: “At oral argument, the Court asked
    Plaintiff[s] to clarify their theory of liability. Counsel stated that Plaintiffs
    now contend that [defendants’] retained water protocol does not comply with
    the requirements set forth in regulations promulgated by the [FSIS] . . .
    under the authority of the [PPIA]. The Court ordered Plaintiffs to submit a
    supplemental statement including citations to argument in their class
    certification papers supporting that theory of liability. The supplemental
    brief concedes that Plaintiffs[] made no such argument in their papers.
    [Citation.] Instead, it indicates that Plaintiffs intend to move for leave to file
    an amended complaint that clearly alleges a cause of action based on this
    revised theory of liability.
    “Because the common issues of law and fact on which Plaintiffs seek
    class certification do not support the causes of action pleaded in the [fourth
    amended complaint], the Court does not grant certification.”8
    Judge Seligman subsequently denied plaintiffs’ motion to file a fifth
    8
    amended complaint. He stated: “In multiple pleading orders up through the
    13
    This appeal followed.
    DISCUSSION
    The Law and Standard of Review
    Class actions are statutorily authorized by Code of Civil Procedure
    section 382: “[W]hen the question is one of a common or general interest, of
    many persons, or when the parties are numerous, and it is impracticable to
    bring them all before the court, one or more may sue or defend for the benefit
    of all.” In order to obtain class status, the class action proponent bears the
    burden of establishing the propriety of class certification, which requires that
    the proponent “must establish the existence of both an ascertainable class
    and a well-defined community of interest among the class members.
    [Citations.] The community of interest requirement involves three factors:
    ‘(1) predominant common questions of law or fact; (2) class representatives
    with claims or defenses typical of the class; and (3) class representatives who
    can adequately represent the class.’ [Citation.]” (Linder v. Thrifty Oil Co.
    (2000) 
    23 Cal.4th 429
    , 435 (Linder).)
    The Consumer Legal Remedies Act (CLRA), upon which plaintiffs’ first
    cause of action is based, also authorizes class actions. (Civ. Code, § 1781.)
    The CLRA sets out four conditions that, if met, mandate certification of a
    class: “(1) It is impracticable to bring all members of the class before the
    court’s October 9, 2018 order, the court has made clear that the only claims
    that are not preempted are claims based on a violation of the applicable
    federal law (PPIA) and regulation[s]. Despite this, plaintiffs filed a massive
    class certification motion, which ultimately included rebuttal and sur-
    rebuttal briefs and numerous motions to strike and evidentiary objections,
    and which turned out to not be based on the permitted theory at all, as
    plaintiffs were forced to admit after the court asked their counsel to identify
    any portion of their voluminous papers that was based on the permitted
    theory. The motion was accordingly denied.”
    14
    court. [¶] (2) The questions of law or fact common to the class are
    substantially similar and predominate over the questions affecting the
    individual members. [¶] (3) The claims or defenses of the representative
    plaintiffs are typical of the claims or defenses of the class. [¶] (4) The
    representative plaintiffs will fairly and adequately protect the interests of the
    class.” (Civ. Code, § 1781, subd. (b).)
    Predominance is the primary class certification requirement at issue in
    this case. “The ‘ultimate question’ the element of predominance presents is
    whether ‘the issues which may be jointly tried, when compared with those
    requiring separate adjudication, are so numerous or substantial that the
    maintenance of a class action would be advantageous to the judicial process
    and to the litigants.’ [Citations.] The answer hinges in ‘whether the theory
    of recovery advanced by the proponents of certification is, and an analytical
    matter, likely to prove amenable to class treatment.’ [Citation.] A court
    must examine the allegations of the complaint and supporting declarations
    [citation] and consider whether the legal and factual issues they present are
    such that their resolution in a single class proceeding would be both desirable
    and feasible.” (Brinker Restaurant Corp. v. Superior Court (2012) 
    53 Cal.4th 1004
    , 1021–1022 (Brinker).)
    Under either statute, “the question of certification [is] essentially a
    procedural one that does not ask whether an action is legally or factually
    meritorious.” (Linder, 
    supra,
     23 Cal.4th at pp. 439–440.) But this does not
    mean the trial court always must ignore the merits of the case. (See Brinker,
    
    supra,
     53 Cal.4th at pp. 1023–1025.) As our Supreme Court recognized,
    “issues affecting the merits of a case may be enmeshed with class action
    requirements . . . .” (Linder, at p. 443.) Thus, in Brinker, the Court held: “To
    the extent the propriety of certification depends upon disputed threshold
    15
    legal or factual questions, a court may, and indeed must, resolve them. Out
    of respect for the problems arising from one-way intervention, however, a
    court generally should eschew resolution of such issues unless necessary.”
    (Brinker, at p. 1025.)
    As to how a ruling on class certification is reviewed, Brinker, supra,
    53 Cal.4th at p. 1022 confirms the law: “On review of a class certification
    order, an appellate court’s inquiry is narrowly circumscribed. ‘The decision to
    certify a class rests squarely within the discretion of the trial court, and we
    afford that decision great deference on appeal, reversing only for a manifest
    abuse of discretion: “Because trial courts are ideally situated to evaluate the
    efficiencies and practicalities of permitting group action, they are afforded
    great discretion in granting or denying certification.” [Citation.] A
    certification order generally will not be disturbed unless (1) it is unsupported
    by substantial evidence, (2) it rests on improper criteria, or (3) it rests on
    erroneous legal assumptions. [Citations.]’ [Citations.] Predominance is a
    factual question; accordingly, the trial court’s finding that common issues
    predominate generally is reviewed for substantial evidence. [Citation.]’ ”
    “ ‘So long as [the trial] court applies proper criteria and its action is
    founded on a rational basis, its ruling must be upheld.’ ” (Brinker, 
    supra,
    53 Cal.4th at p. 1022, quoting Hamwi v. Citinational-Buckeye Inv. Co. (1977)
    
    72 Cal.App.3d 462
    , 472.) One valid reason for denying certification is
    sufficient. (Sav-On Drug Stores, Inc. v. Superior Court (2004) 
    34 Cal.4th 319
    ,
    327 (Sav-On.)
    16
    Judge Seligman Did Not Abuse His Discretion in Denying
    Certification
    The Denial Was Not Based on an Improper Merits Inquiry
    Plaintiffs contend that Judge Seligman abused his discretion because
    he probed into the substantive merits of their operative complaint in denying
    class certification.9 We disagree.
    First, plaintiffs argue that Judge Seligman “denied class certification
    based on [its] assessment of the ‘legal sufficiency’ of the plaintiffs’ theory of
    liability, a merits issue.” They are mistaken. Plaintiffs’ argument is in
    reference to Judge Seligman’s statement in the order that “the alleged
    common issues of law and fact on which [p]laintiffs seek certification have
    already been held legally insufficient.” Such finding was made with respect
    to plaintiffs’ theory of liability that defendants’ products violated the PPIA
    because the packaging contained more liquid at the time of consumption and
    testing by the plaintiffs than was disclosed on the “retained water” labels.
    Judge Seligman correctly observed that such claim had been previously
    considered and held preempted as a matter of law by Judge Petrou when she
    sustained defendants’ demurrer to the second amended complaint. Thus,
    contrary to plaintiffs’ assertion, Judge Seligman did not assess the “legal
    sufficiency” of their theory of liability. Rather, he simply observed that such
    theory already had been “weed[ed] out [as] legally meritless . . . prior to
    certification via [defendants’] demurrer.” (Linder, supra, 23 Cal.4th at
    p. 440.) It was entirely proper for Judge Seligman to preclude plaintiffs from
    9   This is plaintiffs’ second argument in their opening brief. We address
    it first, as it affects the resolution of their remaining arguments. We also
    note that plaintiffs’ second argument has a sub-part, which asserts a due
    process challenge to Judge Seligman’s failure to afford plaintiffs an
    opportunity to brief issues allegedly raised by him for the first time at the
    certification hearing. We address that claim below.
    17
    pursuing a theory on class certification that already had been rejected by the
    court.
    Second, plaintiffs assert that Judge Seligman engaged in an improper
    merits analysis when he “compar[ed] [their] record evidence at the time of the
    hearing with that introduced by [defendants]” and concluded “that evidence
    did not support a final merits determination in [plaintiffs’] favor at that
    time.” This argument also does not support reversal.
    Plaintiffs are correct that the substantive merits of the complaint’s
    allegations generally are not at issue on class certification. (Linder, 
    supra,
    23 Cal.4th at pp. 443; Brinker, 
    supra,
     53 Cal.4th at p. 1023.) By the same
    token, however, the focus of the class certification inquiry is on “the nature of
    the legal and factual disputes likely to be presented,” (Brinker, at p. 1025) as
    those disputes are framed not only by the pleadings but also by the
    defendants’ answer and affirmative defenses. (Id. at p. 1024, citing Fireside
    Bank v. Superior Court (2007) 
    40 Cal.4th 1069
    , 1092 [trial court may consider
    “how various claims and defenses relate and may affect the course of the
    litigation”]; see also Walsh v. IKON Office Solutions, Inc. (2007)
    
    148 Cal.App.4th 1440
    , 1450.) Because that inquiry frequently will be
    “enmeshed” with “issues affecting the merits of a case” (Linder, at p. 443),
    “when evidence or legal issues germane to the certification question bear as
    well on aspects of the merits, a court may properly evaluate them.” (Brinker,
    at pp. 1023–1024.) In particular, “whether common or individual questions
    predominate will often depend upon resolution of issues closely tied to the
    merits.” (Id. at p. 1024.) That is because a court must determine “whether
    the elements necessary to establish liability are susceptible of common proof.”
    (Ibid.)
    18
    Stated differently, “a trial court must examine the plaintiff’s theory of
    recovery, assess the nature of the legal and factual disputes likely to be
    presented, and decide whether individual or common issues predominate. To
    the extent the propriety of certification depends upon disputed threshold
    legal or factual questions, a court may, and indeed must, resolve them.”
    (Brinker, supra, 53 Cal.4th at p. 1025.)
    “[I]f the parties’ evidence is conflicting on the issue of whether common
    or individual questions predominate . . . the trial court is permitted to credit
    one party’s evidence over the other’s in determining whether the
    requirements for class certification have been met—and doing so is not . . . an
    improper evaluation of the merits of the case.” (Dailey v. Sears, Roebuck &
    Co. (2013) 
    214 Cal.App.4th 974
    , 991 (Dailey).) The trial court has “discretion
    to credit [one party’s evidence on predominance] over [the other’s], and we
    have no authority to substitute our own judgment for the trial court’s
    respecting this or any other conflict in the evidence.” (Sav-On, 
    supra,
    34 Cal.4th at p. 331.)
    Thus, “a class plaintiff’s theory of common proof must be more than
    wishful thinking; it must have a foundation in the evidence.” (Payton v. CSI
    Electrical Contractors, Inc. (2018) 
    27 Cal.App.5th 832
    , 842; see Brinker,
    53 Cal.4th at p. 1021 [instructing that a trial court must examine the
    plaintiff’s complaint “and supporting declarations” in determining whether
    the “ ‘theory of recovery advanced by the proponents of certification is, as an
    analytical matter, likely to prove amenable to class treatment’ ”].) Plaintiffs
    are “required to do more than simply show that common issues exist. Rather,
    plaintiffs need[ ] to ‘place substantial evidence in the record that common
    issues predominate.’ ” (Morgan v. Wet Seal, Inc. (2012) 
    210 Cal.App.4th 1341
    , 1354−1355; see Cruz v. Sun World Internat., LLC (2015)
    19
    
    243 Cal.App.4th 367
    , 384, disapproved on another ground in Noel v. Thrifty
    Payless, Inc. (2019) 
    7 Cal.5th 955
    , 986, fn. 15 [plaintiffs “may not simply
    allege” a uniform policy or practice, but must “present substantial evidence
    that proving both the existence of the defendant’s uniform policy or practice
    and the alleged illegal effects of that policy or practice could be accomplished
    efficiently and manageably within a class setting”].)
    The theory of liability that plaintiffs focus on in this appeal is their
    “moisture gain theory.” That theory, as they frame it, is this: “[Defendants’]
    ‘Moisture Gain’ measurements calculate the same mathematical quantity as
    ‘Retained Water’ as defined under the PPIA and are therefore competent
    evidence tending to prove that the Products exceed their labeled Retained
    Water [statements].” In support of their argument that liability could be
    determined using common proof, plaintiffs relied on the data defendants
    compiled in their “Moisture Gain Evaluation” at one of their poultry
    processing facilities, and plaintiffs’ experts’ interpretations of defendants’
    data.
    Moisture gain, calculated as the difference between the weight of a bird
    before and after it is immersed in the chiller, was indicated in defendants’
    documents as “% H2O retained.” Plaintiffs thus assumed that defendants’
    moisture gain percentages necessarily measured the amount of retained
    water for purposes of the PPIA. Because the numbers quantified as “% H2O
    retained” in defendants’ documents apparently were higher than the
    percentages of retained water that were stated on some of defendants’
    products’ labels, plaintiffs argued that defendants mislabeled their products.
    Defendants, of course, did not concede to plaintiffs’ interpretations of
    defendants’ own data. Defendants presented the declaration of one of their
    employees along with supporting documentary evidence detailing the process
    20
    by which they measure retained water. That evidence established that
    defendants submitted a data collection protocol to the FSIS; that protocol
    called for the oven drying testing method to measure retained water, and
    separately, moisture gain as a process control check on that method; and that
    the FSIS stated it reviewed that protocol and had no objection to it. Plaintiffs
    did not dispute this evidence. As such, it was undisputed that under
    defendants’ retained water protocol, chiller moisture gain was not used to
    measure retained water. Defendants argued that to the extent plaintiffs
    insisted otherwise, they “fundamentally misunderst[ood] the import and
    application of the chiller moisture gain data.” Also, in light of the
    requirements under the PPIA and its regulations that defendants measure
    retained water in accordance with their FSIS-reviewed protocol (
    9 C.F.R. § 441.10
    (a), (c), (d)), defendants asserted that plaintiffs failed to establish
    that defendants’ moisture gain data provided a method to prove class-wide
    liability.
    Judge Seligman examined both parties’ evidence in light of the PPIA
    and its implementing regulations. He found that the factual predicate of
    plaintiffs’ “moisture gain theory”—that defendants’ moisture gain data in fact
    measured the amount of retained water in their products—was unsupported
    by the record. Specifically, he determined the moisture gain calculations
    relied upon by plaintiffs failed to “distinguish between water retained by a
    carcass immediately after immersion and the amount of retained water in the
    final product after processing.” In other words, the evidence did not
    demonstrate that the measurements were taken at the point in time when
    “retained water” is determined for purposes of the PPIA. (
    9 C.F.R. §§ 381.66
    (d), 441.10.) In so finding, Judge Seligman appears to have credited
    defendants’ evidence that that they submitted a protocol to the FSIS, to
    21
    which the FSIS did not object, and that under such protocol, moisture gain
    was used as a mere process control check, rather than the actual method of
    measuring retained water in the final product after processing.
    Judge Seligman also found plaintiffs’ moisture gain evidence “does not
    tend to show that [defendants] failed to file, or abide by, a compliant retained
    water protocol under FSIS’s retained water regulation[s].” In so finding,
    Judge Seligman again apparently credited defendants’ evidence that they did
    not use moisture gain to measure retained water. Thus, he determined that
    plaintiffs had no evidence tending to show that defendants incorrectly
    measured retained water, such that they failed in their obligations of
    developing and complying with a valid retained water protocol as required by
    federal law. (
    9 C.F.R. § 441.10
    .)
    Contrary to plaintiffs’ argument, Judge Seligman did not improperly
    make a “a final merits determination.” He did not, as plaintiffs contend,
    “assess[] a merits question divorced from consideration of any of the criteria
    for class certification.” Rather, under the authorities discussed above, Judge
    Seligman was entitled to, and did, weigh the evidence for the purpose of
    determining whether the class certification requirements, namely
    predominance, were met. (Dailey, supra, 214 Cal.App.4th at p. 991.)
    Specifically, he was permitted to consider the evidence in determining
    whether plaintiffs established the existence of an unlawful practice or
    procedure of mislabeling products with a classwide impact. (Id. at p. 989.)
    He was not required to simply accept plaintiffs’ mere assertion that the
    moisture gain data provided a common method of proving class-wide liability,
    as plaintiffs seem to suggest. Accordingly, when Judge Seligman found that
    such common theory of proof had no foundation in the evidence, he was
    acting within his discretion.
    22
    The Denial Was Supported by the Record
    Plaintiffs contend the trial court denied class certification based on its
    erroneous factual assumption that defendants’ “ ‘[m]oisture [g]ain’
    measurements were taken ‘before processing and packaging’ and therefore
    did not measure ‘[r]etained [w]ater’ because it did not reflect the condition of
    the [p]roducts at the point of packaging.”
    Initially, plaintiffs do not expressly identify the standard of review that
    applies to their argument. They mention in passing that where the denial of
    class certification is based “on erroneous assumptions, that decision cannot
    stand,” citing to Ayala v. Antelope Valley Newspapers, Inc. (2014) 
    59 Cal.4th 522
    . However, the cited statement was made with respect to “erroneous legal
    assumptions.” (Id., at p. 537, italics added.) Because plaintiffs’ argument
    depends on the evaluation of disputed factual evidence, we review Judge
    Seligman’s factual findings for substantial evidence. (Sevidal v. Target Corp.
    (2010) 
    189 Cal.App.4th 905
    , 918, citing Sav-On, 
    supra,
     34 Cal.4th at p. 328;
    Massachusetts Mutual Life Ins. Co. v. Superior Court (2002) 
    97 Cal.App.4th 1282
    , 1287–1288.)
    On an appeal challenging the sufficiency of the evidence, an appellant’s
    opening brief must set forth all the material evidence on point; the brief
    cannot merely state facts favorable to the appellant. (Foreman & Clark
    Corp. v. Fallon (1971) 
    3 Cal.3d 875
    , 881.) “It is the appellant’s burden, not
    the court’s, to identify and establish deficiencies in the evidence.” (Huong
    Que, Inc. v. Luu (2007) 
    150 Cal.App.4th 400
    , 409.) When an appellant’s
    opening brief states only the favorable facts, ignoring evidence favorable to
    respondent, the appellate court may treat the substantial evidence issues as
    waived and presume the record contains evidence to sustain every finding of
    fact. (Doe v. Roman Catholic Archbishop of Cashel & Emly (2009)
    
    177 Cal.App.4th 209
    , 218.)
    23
    Here, in their opening brief, plaintiffs cherry pick isolated pieces of
    evidence as support for a conclusion that they insist Judge Seligman should
    have made—that defendants’ moisture gain data measured retained water.
    Plaintiffs do not discuss the evidence that provides the context of the data
    upon which they rely, much less the evidence favorable to defendants.
    Because plaintiffs have failed in their obligations concerning the discussion
    and analysis of a substantial evidence issue, we deem the issue forfeited.
    (Doe v. Roman Catholic Archbishop of Cashel & Emly, supra,
    177 Cal.App.4th at p. 218.)
    Even overlooking the forfeiture, substantial evidence supports Judge
    Seligman’s finding that plaintiffs’ evidence failed to establish that the
    moisture gain data measured retained water. Where the class certification
    order turns on inferences to be drawn from the facts, we have “ ‘ “no
    authority to substitute [our] decision for that of the trial court.” ’ ”
    (Massachusetts Mutual Life Ins. Co. v. Superior Court, supra, 97 Cal.App.4th
    at p. 1287; see Brinker, 
    supra,
     53 Cal.4th at p. 1022 [“We must ‘[p]resume in
    favor of the certification order . . . the existence of every fact the trial court
    could reasonably deduce from the record . . .’ ”].) As discussed, the evidence
    ignored by plaintiffs showed that under defendants’ protocol, the oven drying
    method was used to measure retained water, while moisture gain testing
    was used as a process control check on the oven drying method. When used
    as a process control check, moisture gain testing, plaintiffs acknowledge, is
    “designed to mimic the Products’ condition at the point of packaging.”
    (Italics added.) Thus, the results of defendants’ moisture gain testing were
    not used to represent the actual amount of retained water. Additionally,
    24
    there was no evidence that defendants did not follow their protocol.10
    Therefore, Judge Seligman could reasonably conclude that moisture gain
    was not a measure of, or equivalent to, the amount of retained water in
    defendants’ final product after processing.
    Judge Seligman Did Not Ignore the Class Criteria
    Plaintiffs argue Judge Seligman committed reversible error because he
    failed to address the elements for class certification in Code of Civil
    Procedure section 382 and Civil Code section 1781. In a related argument,
    plaintiffs assert Judge Seligman further erred because he did not
    “distinguish its reasoning applicable to the Section 382 causes of action from
    those governed by the CLRA Section 1781 [claim].” We disagree on both
    counts.
    Plaintiffs are incorrect that Judge Seligman did not address any of the
    statutory class certification elements in the order denying the motion.
    Although the order does not include specific findings on each of the class
    criteria, the record discloses that the certification dispute turned on the
    element of predominance. (See Dailey, supra, 214 Cal.App.4th at p. 986
    [“[E]ven if the trial court’s order on class certification does not state reasons,
    or does so without providing detail, it will be deemed sufficient for review
    purposes so long as the basis for the court’s ruling may be discerned from the
    record”].) The order repeatedly refers to and analyzes the “common issues of
    law and fact” identified by plaintiffs and expressly bases the denial of class
    certification on such analysis. At the hearing, Judge Seligman stated at the
    outset, “What I have to decide is, based on your theory of the case, are there .
    . . substantial common questions in the case[?]” Because Judge Seligman’s
    10 Indeed, after the certification hearing, plaintiffs filed a motion for
    leave to amend the operative complaint to include new allegations that
    defendant did not follow their submitted protocol.
    25
    reasoning was discernible from his statements and context, we reject
    plaintiffs’ argument that he ignored the statutory criteria for class
    certification.
    To the extent plaintiffs suggest that specific findings must be made on
    each of the class criteria, plaintiffs are wrong. None of the cases that
    plaintiffs cite supports this point. The cited portions of those cases simply
    discuss general principles of class action law. (See, e.g., Linder, 
    supra,
    23 Cal.4th at p. 437, Noel v. Thrifty Payless, Inc., 
    supra,
     7 Cal.5th at pp. 968–
    969, Myers v. Raley’s (2019) 
    32 Cal.App.5th 1239
    , 1247, and Stephens v.
    Montgomery Ward (1987) 
    193 Cal.App.3d 411
    , 412.) In any event, specific
    findings on each of the class certification criteria are not required.
    (Osborne v. Subaru America, Inc. (1988) 
    198 Cal.App.3d 646
    , 652, fn. 1.)
    We also reject plaintiffs’ argument that Judge Seligman committed
    reversible error by not distinguishing between Code of Civil Procedure
    section 382 and Civil Code section 1781 in his analyses. Even if the failure to
    distinguish between the two statutes was error—which plaintiffs have not
    established—they fail to demonstrate any prejudice. “An appellant bears the
    burden to show not only that the trial court erred, but also that the error was
    prejudicial in that it resulted in a miscarriage of justice. (Cal. Const., art. VI,
    § 13; Code Civ. Proc., § 475.) An error is prejudicial and results in a
    miscarriage of justice only if the reviewing court concludes, based on its
    review of the entire record, that it is reasonably probable that the trial court
    would have reached a result more favorable to the appellant absent the error.
    (Cassim v. Allstate Ins. Co. (2004) 
    33 Cal.4th 780
    , 800.)” (Jones v. Farmers
    Ins. Exchange (2013) 
    221 Cal.App.4th 986
    , 999.) As defendants note,
    plaintiffs do not “explain what distinctions between [Code of Civil Procedure]
    Section 382 and the CLRA the trial court in this case should have taken into
    26
    account—much less how any distinctions would have made a difference.”
    Accordingly, any error in failing to distinguish between the two statutory
    frameworks does not require reversal.
    The Due Process Challenge Fails
    Plaintiffs argue that they were deprived of due process when Judge
    Seligman sua sponte raised new theories of liability at the certification
    hearing without giving plaintiffs an opportunity to brief those theories.
    In the first place, the claim is forfeited because plaintiffs did not raise a
    due process concern below, request to present additional briefing, or
    otherwise object to the alleged irregularity. (Mundy v. Lenc (2012)
    
    203 Cal.App.4th 1401
    , 1406 [“ ‘As a general rule, failure to raise a point in
    the trial court constitutes [a] of waiver and appellant is estopped to raise that
    objection on appeal’ ”]; Geftakys v. State Personnel Board (1982)
    
    138 Cal.App.3d 844
    , 864 [“It is the general rule applicable in civil cases that a
    constitutional question must be raised at the earliest opportunity or it will be
    considered as waived”].)
    The claim is also unavailing. It is based on the faulty premise that
    Judge Seligman himself, as opposed to plaintiffs, raised new theories of
    liability at the hearing. The record shows that Judge Seligman and plaintiffs’
    counsel engaged in a lengthy discussion aimed at clarifying plaintiffs’ theory
    of liability because it was not clearly stated in their certification papers.
    During this discussion, counsel stated plaintiffs were asserting several
    theories of liability under the PPIA. Judge Seligman repeated those theories
    as he understood them and asked counsel to confirm whether his
    understanding was correct. In response, counsel would either state
    affirmatively that Judge Seligman’s descriptions of plaintiffs’ theories were
    correct or acquiesce to his descriptions by not objecting to them and
    proceeding to expound upon them. Thus, the record does not demonstrate
    27
    that Judge Seligman raised new theories of liability on his own initiative. On
    the contrary, as plaintiffs later admitted, it was they who raised new
    arguments at the hearing that were not raised in their certification papers.
    On top of that, plaintiffs filed a motion to file a fifth amended complaint to
    allege those new theories of liability.
    DISPOSITION
    The order is affirmed. Defendants shall recover their costs on appeal.
    28
    _________________________
    Richman, Acting P. J.
    We concur:
    _________________________
    Stewart, J.
    _________________________
    Mayfield, J. *
    Wong v. Foster Farms, LLC (A161435)
    *Judge of the Mendocino Superior Court, Judge Cindee Mayfield, sitting as
    assigned by the Chief Justice pursuant to article VI, section 6 of the California
    Constitution.
    29