Cat Food Composition for Treating Urolithiasis and Reducing Hairballs

ChangeBridge: Patent Apps - Therapeutics (A61P)

Published April 2nd, 2026

Detected April 2nd, 2026

Summary

The USPTO published patent application US20260090571A1 for a cat food composition targeting urolithiasis (urinary stones) and hairball reduction. Inventors Nolan Z. Frantz, Angela M. Gajda, and Todd Harper developed wet and dry formulations incorporating omega-3 sources (flaxseed, fish oil), acidifiers (calcium sulfate, SAPP), methionine, taurine, and dietary fiber to achieve urine pH between 6.15-6.85 and reduce RSS struvite to ≤1.8 and RSS oxalate to ≤6.0.

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What changed

The USPTO published patent application US20260090571A1 filed September 5, 2025 (Application No. 19319905), covering a cat food composition for treating or preventing urolithiasis while reducing hairball incidence. The composition combines omega-3 fatty acids from flaxseed and fish oil with pH-modifying agents (calcium sulfate, potassium sulfate, methionine, SAPP, taurine) and dietary fiber. Target parameters include urine pH of 6.15-6.85, RSS struvite ≤1.8, and RSS oxalate ≤6.0.

This is a patent application for intellectual property protection, not a regulatory requirement. Pet food manufacturers and pet food ingredient suppliers may review the application to understand potential competitive landscape developments. No compliance deadlines, penalties, or regulatory obligations are associated with this publication.

Source document (simplified)

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Cat Food Composition for Treating or Preventing Urolithiasis and for Reducing the Incidence of Hairballs

Application US20260090571A1 Kind: A1 Apr 02, 2026

Inventors

Nolan Z. Frantz, Angela M. Gajda, Todd Harper

Abstract

A cat food composition comprises ingredients that work to manage hairball formation as well as urine pH and urine saturation levels to treat or prevent urolithiasis. In some embodiments, a wet cat food composition comprises flaxseed, fish oil, calcium sulfate, methionine, sodium acid pyrophosphate (SAPP) and a source of dietary fiber. In some embodiments, a dry cat food composition comprises fish oil, methionine, taurine, potassium sulfate and a source of dietary fiber. Flaxseed and/or fish oil provide omega-3 fatty acids to minimize urolith formation. Calcium sulfate, potassium sulfate, taurine, methionine and/or SAPP help achieve an ideal urine pH between 6.15 and 6.85. The source of dietary fiber helps reduce the incidence of hairballs. In some embodiments, the cat food composition is configured to establish an average RSS struvite value less than or equal to 1.8, and/or an average RSS oxalate less than or equal to 6.0.