Joanna Pitzen, et al. v. Atlantic Animal Health, Inc. d/b/a Squire Laboratories, Inc. and Neogen Corporation

CourtDistrict Court, S.D. California
DecidedMay 11, 2026
Docket3:25-cv-00196
StatusUnknown

This text of Joanna Pitzen, et al. v. Atlantic Animal Health, Inc. d/b/a Squire Laboratories, Inc. and Neogen Corporation (Joanna Pitzen, et al. v. Atlantic Animal Health, Inc. d/b/a Squire Laboratories, Inc. and Neogen Corporation) is published on Counsel Stack Legal Research, covering District Court, S.D. California primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Joanna Pitzen, et al. v. Atlantic Animal Health, Inc. d/b/a Squire Laboratories, Inc. and Neogen Corporation, (S.D. Cal. 2026).

Opinion

1 2 3 4 5 6 7 8 UNITED STATES DISTRICT COURT 9 SOUTHERN DISTRICT OF CALIFORNIA 10 11 JOANNA PITZEN, et al., Case No.: 25-cv-0196-ABJ-DEB 12 ORDER: Plaintiff, 13 (1) DENYING DEFENDANT v. 14 NEOGEN’S MOTION TO DISMISS ATLANTIC ANIMAL HEALTH, INC. (Doc. No. 63) 15 d/b/a SQUIRE LABORATORIES, INC. 16 and NEOGEN CORPORATION, (2) DENYING DEFENDANT NEOGEN’S MOTION FOR MORE 17 Defendants. DEFINITE STATEMENT (Doc. No. 64) 18 19 20 Before the Court are two pending motions: (1) Defendant Neogen Corporation’s 21 (“Neogen”) Motion to Dismiss the Fraud-Based Claims in Plaintiffs’ Amended Complaint 22 (Doc. No. 63) and (2) Neogen’s Motion for More Definite Statement (Doc. No. 64). 23 Plaintiffs responded in opposition to both motions (Doc. Nos. 66; 67) and Neogen replied 24 (Doc. Nos. 69; 70). For the reasons stated below, the motions are DENIED. 25 I. BACKGROUND 26 A. Procedural History 27 Plaintiffs Joanna Pitzen, Joanne Mercer, Caroline Oddie, and Jenny Barrett 28 (“Plaintiffs”) initiated the instant action on January 28, 2025, alleging causes of action for 1 negligence and strict products liability. (Doc. No. 1.) On March 24, 2025, Neogen filed a 2 motion to dismiss the complaint. (Doc. No. 15.) Thereafter, the Parties filed a joint motion 3 seeking leave for Plaintiffs to file an amended complaint. (Doc. No. 23.) The Court granted 4 the joint motion, and Plaintiffs filed the First Amended Complaint (“FAC”). (Doc. No. 25.) 5 Neogen and Defendant Atlantic Animal Health, Inc. d/b/a Squire Laboratories, Inc. 6 (“Squire”) both moved to dismiss the FAC. (Doc. Nos. 35; 37.) Plaintiffs dismissed Squire 7 pursuant to Federal Rule of Civil Procedure 41(a)(1)(A)(i) and the Court denied Squire’s 8 Motion to Dismiss as moot. (Doc. Nos. 56; 57.) On October 27, 2025, the Court granted in 9 part and denied in part Neogen’s Motion to Dismiss (Doc. No. 61.) In that order, the Court 10 concluded Plaintiffs had not adequately pleaded fraudulent concealment tolling because 11 they failed to allege with sufficient particularity affirmative acts of concealment 12 attributable to Neogen and facts concerning discovery of the alleged concealment. Thus, 13 the Court found that Plaintiffs could not rely on a theory of fraudulent concealment to toll 14 their claims. Notably, the Court did not dismiss any cause of action. Rather, the Court 15 found that “Plaintiff Barrett’s claims appear[ed] barred by the statute of limitations and her 16 claims [were] dismissed with leave to amend.” (Doc. No. 61 at 15.)1 Additionally, “[t]he 17 Court [found] Plaintiffs Pitzen, Mercer, and Oddie’s claims [] sufficiently plead as tolled 18 under the delayed discovery rule.” (Id.) 19 Subsequently, Plaintiffs filed the operative Second Amended Complaint (“SAC”). 20 (Doc. No. 62.) On December 8, 2025, Neogen filed the instant Motion to Dismiss and 21 Motion for More Definite Statement. (Docs. Nos. 63; 64.) Neogen moves to “dismiss” 22 Plaintiffs’ purported “fraud-based claims” arguing the allegations fail to satisfy Rule 9(b). 23 (Doc. No. 63.) Additionally, Neogen moves for a more definite statement “because 24 Plaintiffs’ pleadings are so vague and ambiguous that Neogen cannot reasonably prepare a 25 response” arguing that “Plaintiffs’ refusal to narrow their pleading to include only those 26

27 1 Citations to the record refer to the CM/ECF system page number at the top of each page rather than the 28 1 allegations against Neogen flies in the face of this Court’s October 27, 2025 Order.” (Doc. 2 No. 64-1 at 4.) 3 B. Factual History 4 Plaintiffs allege that Neogen and Squire developed, manufacture, market, and 5 distribute Fura-Zone, a topical antibacterial ointment containing the active ingredient 6 nitrofurazone (“NFZ”). (Doc No. 62 ¶¶ 7, 11, 12.) NFZ is an odorless, pale-yellow 7 antimicrobial agent in powder form that treats and prevents surface bacterial infections in 8 wounds, burns, and cutaneous ulcers in horses. (Id. ¶¶ 11, 13.) Equestrians administer Fura- 9 Zone topically by applying it directly on lesions with a spatula or first on a piece of gauze. 10 (Id. ¶¶ 14, 15.) According to the Fura-Zone instructions, the product can also be used as a 11 sweat by lathering Fura-Zone around the affected joint, covering it in plastic wrap, and 12 then applying a bandage. (Id. ¶ 16.) When applying a sweat, it is common to mix Fura- 13 Zone, an NFZ-based product, with dimethyl sulfoxide (“DSMO”), a colorless liquid that 14 aids the transportation of toxic compounds across skin, thereby inducing toxicosis from the 15 NFZ. (Id. ¶ 17.) Plaintiffs allege that these instructions permit exposure through touch and 16 inhalation. (Id. ¶¶ 15, 26.) 17 According to the SAC, studies dating back to the 1960s show that NFZ produces 18 mammary tumors in rats and ovarian tumors in mice. (Id. ¶ 19.) Studies from the National 19 Toxicology Program found “clear evidence” of carcinogenic activity of NFZ for female 20 rats and mice, and “equivocal evidence” of carcinogenic activity of NFZ for male rats. (Id. 21 ¶ 21.) Further, scientists have explained that NFZ not only causes cancer but also makes 22 existing cancer progress at a much faster rate because NFZ spurs cell proliferation, 23 promoting progression in carcinogenesis. (Id. ¶ 24.) 24 Plaintiffs contend that scientific knowledge of NFZ’s toxicity has led to increasing 25 regulations of its use. (Id. ¶¶ 27–30.) In 1991, the Federal Drug Administration (“FDA”) 26 banned NFZ for use in poultry and swine consumed by humans because of cancer risks. 27 (Id. ¶ 28.) In 2002, the FDA banned the topical use of nitrofurans on food-producing 28 animals because studies proved that cattle treated with NFZ had carcinogenic residue in 1 their milk and tissues. (Id. ¶ 29.) Additionally, California’s Proposition 65 includes NFZ 2 in its lists of carcinogens and/or reproductive toxicants as a reproductive toxicant. (Id. 3 ¶ 30.) 4 Plaintiffs allege that they understood Fura-Zone was intended to be used on horses. 5 (Id. ¶ 31.) However, Plaintiffs contend they were not aware they were risking reproductive 6 harm by applying Fura-Zone in a manner proscribed by the product itself. (Id.) Plaintiffs 7 all allege they routinely used Fura-Zone as an antibiotic ointment, applying it to horses 8 within their care, including but not limited to, the exposure described below. (Id. ¶ 18.) 9 A. Plaintiff Pitzen was first exposed as a teenager while working as a horse 10 groomer. There, she would mix Fura-Zone with DSMO to create a sweat which she would lather on the horses’ joints. She continued her 11 work at multiple locations through San Diego County and over time 12 experienced significant exposure to Fura-Zone. (Id.) 13 B. Plaintiff Mercer was first exposed to Fura-Zone at age 11 and spent the 14 next 20 years applying Fura-Zone that was premixed with DSMO to create a sweat. (Id.) 15 C. Plaintiff Oddie was exposed to Fura-Zone every weekend for 16 approximately three years between 1975 to 1978. During that time, she 17 would mix Fura-Zone with DSMO to create a sweat which she lathered around horses’ joints. (Id.) 18 19 D. Plaintiff Barrett was frequently and continuously exposed to Fura-Zone since she was a young child. From that time until 2000, Barrett 20 routinely used Fura-Zone, applying the ointment with her fingers and 21 hands. (Id.) 22 Plaintiffs contend they did not discover facts that would cause a reasonable person 23 to suspect the risks associated with exposure to NFZ or Fura-Zone until June of 2024. (Id. 24 ¶ 32.) On June 17, 2024, Plaintiff Barrett posted on Facebook asking if any other women 25 who worked with horses developed ovarian cysts or fibroids after using NFZ ointment. 26

27 2 NFZ is a part of the chemical class referred to as nitrofurans.

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Joanna Pitzen, et al. v. Atlantic Animal Health, Inc. d/b/a Squire Laboratories, Inc. and Neogen Corporation, Counsel Stack Legal Research, https://law.counselstack.com/opinion/joanna-pitzen-et-al-v-atlantic-animal-health-inc-dba-squire-casd-2026.