Five years after forging a strategic alliance, U.S.-based Bond Pet Foods and Hill’s Pet Nutrition, a subsidiary of Colgate-Palmolive, have reached a pivotal milestone: obtaining a "no questions" letter from the U.S. Food and Drug Administration (FDA) for Bond’s precision-fermented lamb protein. This significant regulatory approval from the FDA’s Center for Veterinary Medicine (CVM) greenlights the commercial sale of this novel ingredient for use in dog food, marking a substantial advancement in the quest for more sustainable and ethically produced pet nutrition.
The "no questions" letter signifies that the FDA has reviewed Bond’s Generally Recognized as Safe (GRAS) notice for its Lamb Protein Yeast ingredient and has no objections to its intended use in finished pet food products for healthy adult dogs, at inclusion rates up to 15%. This outcome is the culmination of extensive collaborative research, rigorous feeding studies, and dedicated regulatory engagement between the two companies.
A Collaborative Journey Towards Sustainable Protein
The partnership between Bond Pet Foods and Hill’s Pet Nutrition commenced in 2021 with a shared vision: to develop innovative and sustainable alternatives to traditional animal proteins for pet food. This collaboration aimed to address the growing environmental concerns associated with conventional meat production, which contributes significantly to greenhouse gas emissions, land use, and water consumption.
Precision fermentation, the technology underpinning Bond’s innovation, operates on a principle akin to brewing. It involves introducing a specific genetic sequence into microorganisms, such as yeast, instructing them to produce targeted proteins when fermented. This biotechnological approach allows for the creation of highly specific animal proteins without the need for traditional animal agriculture. Bond leverages this process to produce a range of recombinant meat proteins, including chicken, turkey, and beef, for pet food applications.
For this specific project, the focus was on developing a lamb protein derived from yeast. The process begins with brewers’ yeast, a naturally protein-rich and nutrient-dense organism. By introducing the genetic blueprint for lamb protein, the yeast is programmed to express these specific amino acid sequences during fermentation. The yeast is cultivated in a nutrient-rich medium, primarily composed of dextrose, with a continuous supply of air to facilitate optimal growth and protein production.
Upon completion of the fermentation cycle, the entire biomass, containing the newly produced lamb protein, is separated from the fermentation broth through centrifugation and a heat treatment. This is followed by a spray-drying process, resulting in a dehydrated, inactive ingredient. The final product boasts a high protein content, with at least 50% of its composition being protein, and over 10% of that being the specifically engineered lamb protein.
Rigorous Testing and Regulatory Scrutiny
Achieving GRAS status for a novel pet food ingredient is a meticulous process that demands comprehensive scientific validation. The Lamb Protein Yeast underwent a stringent six-month longitudinal feeding study in dogs. This study, designed to assess the ingredient’s safety and nutritional efficacy, involved 40 dogs divided into four groups. Various health parameters were closely monitored, including body weight, food intake, blood biomarkers, and urinary indicators.
The results of this extensive study, as detailed in the published findings, indicated minimal to no significant differences among the groups receiving varying levels of the precision-fermented lamb protein compared to the control group. While certain markers like serum chloride, cholesterol, homocysteine, and whole blood taurine were observed to be lower in dogs fed the experimental ingredient, these levels remained within established reference ranges. Crucially, the study found similar digestibility across all tested foods, with a minor observation of lower fat digestibility in foods containing the test ingredient.
"The results of our six-month feeding study, together with the FDA’s Letter of No Objection, demonstrate the safety and nutritional performance of our brewed proteins and bring us a significant step closer to delivering a reliable source of high-quality protein for pets," stated Rich Kelleman, founder and CEO of Bond Pet Foods. This sentiment underscores the critical role of scientific validation in securing regulatory approval and building consumer trust.
Expanding Horizons: Feline Nutrition and Commercial Scale
The successful regulatory pathway for canine use is not the end of the journey. Bond Pet Foods and Hill’s Pet Nutrition have also completed a feeding trial specifically for cats and are actively preparing to submit additional data to the CVM for feline applications. This dual-species approach highlights the versatility of precision fermentation technology and the companies’ commitment to providing comprehensive nutritional solutions for the pet market.
Beyond regulatory achievements, Bond Pet Foods has demonstrated its capacity for large-scale production. The company has reached a commercial scale of 45,000 liters for its brewed lamb protein. To date, more than 25 metric tons of this fermentation-derived ingredient have been supplied to Hill’s Pet Nutrition’s facilities, facilitating further formulation, testing, and evaluation processes. This established production capacity is essential for meeting the demands of the commercial pet food market.
Dave Baloga, Executive Vice President of Science and Technology at Hill’s Pet Nutrition, emphasized the strategic importance of this development. "Lamb Protein Yeast expands the range of science-backed nutritional options we can deliver, supporting our sustainability objectives while maintaining the rigorous nutritional standards for which Hill’s is known," Baloga commented. This statement reflects Hill’s commitment to integrating novel, sustainable ingredients without compromising its long-standing reputation for quality and efficacy.
The Broader Landscape of Sustainable Pet Food
The FDA’s "no questions" letter for Bond Pet Foods’ lamb protein arrives at a time of burgeoning innovation and investment in the low-carbon pet food sector. This regulatory breakthrough for Bond and Hill’s is particularly noteworthy given the increasing recognition of the environmental impact of pet food production. Studies have indicated that meat-free pet food is one of the most effective measures to mitigate the climate footprint of companion animals, even when considering the use of animal byproducts in conventional pet foods.
This development also follows closely on the heels of other significant advancements in the sustainable pet food arena. Just last month, Bond Pet Foods secured a substantial investment from Symrise, a global leader in flavors and fragrances. This partnership aims to accelerate the creation of new precision-fermented products for pet nutrition, targeting a broader client base.
The momentum in the climate-friendly pet food market is palpable. In the current month, Enifer and Rovio Pet Foods launched a semi-moist dog treat utilizing Enifer’s Pekilo mycoprotein ingredient. Simultaneously, MicroHarvest announced plans to co-launch 15 new pet food products featuring its mycelium protein in the second quarter of 2026.
Furthermore, UK-based startup Meatly successfully raised £10 million (approximately $14.1 million) to establish Europe’s largest cultivated meat facility, with plans to begin delivering pet food products next year, following its anticipated debut in 2025. In Singapore, Friends & Family Pet Food has already launched eight cultivated meat products tailored for various pet needs, with an additional four slated for release this month.
These parallel developments underscore a significant industry shift towards more sustainable and ethically sourced ingredients for pet food. The successful regulatory approval for Bond Pet Foods and Hill’s Pet Nutrition is not merely a company-specific achievement but a landmark event that validates the potential of precision fermentation technology and paves the way for broader adoption of novel, low-impact protein sources in the global pet food market. The integration of such innovations is crucial for meeting the dietary needs of a growing pet population while simultaneously addressing pressing environmental challenges. The collaboration between Bond and Hill’s serves as a compelling model for future partnerships in this dynamic and increasingly important sector.
