FDA clears fermented lamb protein ingredient for dog food use

Hill’s Pet Nutrition and Bond Pet Foods said Bond has received an FDA Center for Veterinary Medicine letter of no objection for its Lamb Protein Yeast ingredient, a precision-fermentation-derived animal protein intended for use in adult maintenance dog diets at up to 15% of the finished food. FDA’s public GRAS inventory identifies the ingredient as dried Saccharomyces cerevisiae expressing an ovine protein, and the agency’s May 7, 2026 response says it has “no questions at this time” regarding Bond’s conclusion that the ingredient is generally recognized as safe for that use. The companies described it as the first animal protein produced via precision fermentation to complete FDA’s GRAS notice review process for pet food, and said cat-food clearance is still being pursued. (fda.gov)

Why it matters: For veterinary professionals, this is less about a new retail SKU today and more about a regulatory and formulation milestone. The FDA letter covers a specific ingredient, species, life stage, and inclusion rate, not a blanket endorsement of all fermentation-derived proteins. Still, it signals that precision-fermentation ingredients are moving from concept to commercial pet nutrition, with digestibility, amino acid profile, manufacturing controls, and feeding-study data now entering the regulatory record. FDA’s letter says safety was assessed in a 26-week feeding study in adult dogs and digestibility in a 19-day study, while Hill’s and Bond say commercialization work is underway and feline review materials are being prepared. (fda.gov)

What to watch: Watch for a cat-use submission to FDA CVM, any product launch details from Hill’s or Bond, and whether other fermentation-derived pet food ingredients follow this same GRAS pathway. (prnewswire.com)