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The Dog Aging Project assessed 1,726 homemade dog diets and concluded that most lacked the balance needed to be considered nutritionally complete.

The finding, published in the American Journal of Veterinary Research, comes from an analysis led by researchers affiliated with the Dog Aging Project and collaborators at Texas A&M and Virginia Tech’s Virginia-Maryland College of Veterinary Medicine. The study examined recipes and ingredients supplied by dog owners to evaluate whether home-prepared meals met established canine nutritional standards.

Dr. Janice O’Brien, a doctoral researcher at the Virginia-Maryland College of Veterinary Medicine at Virginia Tech, summarized the scale of the gap: “We found that only 6% of homemade diets had the potential to be nutritionally complete.”

The Dog Aging Project, a research initiative that studies the effects of aging and what makes a healthy canine life, worked with faculty at the Texas A&M College of Veterinary Medicine and Biomedical Sciences on the analysis. The collaboration placed the owners’ recipes alongside benchmarks used to judge complete and balanced diets.

Board-certified veterinary nutritionist Dr. Katie Tolbert, an associate professor in VMBS’ Department of Small Animal Clinical Sciences, warned about the clinical risks of imbalanced meals. “If your dog’s calcium and phosphate levels get out of balance, they can develop bone health problems, including a condition nicknamed ‘rubber jaw’ where the bone starts to become soft, like cartilage,” she said.

Tolbert also noted behavioral and ingredient pitfalls for owners preparing food at home. “There is a temptation for a lot of dog owners to go off script when preparing meals at home,” she said, and added a concise reminder about specific hazards: “Grapes can be toxic to dogs.”

The study’s results reinforce long-standing concerns within veterinary nutrition about the difficulty of matching home-prepared meals to the nutrient profiles that commercial diets are formulated to meet under guidance from bodies such as the Association of American Feed Control Officials and the United States Food and Drug Administration, both of which provide recommendations for canine nutrition.

Researchers placed the owners’ ingredient lists and preparation notes into analytical frameworks used by veterinary nutritionists to assess whether a diet could meet an individual dog’s needs. The paper was released through the American Journal of Veterinary Research; the Dog Aging Project characterized the effort as part of its broader investigation into factors that influence canine health across lifespans.

Veterinary scientists have previously examined home-prepared recipes and their nutritional adequacy. A peer-reviewed analysis archived on PubMed Central explored mineral and vitamin imbalances in home-prepared pet diets, and university research groups have also published findings assessing recipe shortcomings and associated risks to animal health.

For clinicians, Tolbert said the stakes extend beyond otherwise healthy pets: “Dogs that are not already in good health can have exacerbated symptoms if they do not receive a balanced diet that is specifically formulated to treat their disease.” The study’s authors stress that nutritional completeness matters both for prevention and for the management of existing conditions.

The Dog Aging Project study adds contemporary, large-scale data to ongoing conversations among veterinarians and pet owners about homemade feeding trends. Researchers and clinicians point to established nutritional standards and professional guidance as the yardstick against which recipes should be judged.

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Original reporting: view the original article.

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