Health & Nutrition

Vegans Feeding Cats and Dogs Plant-Based Diets

Few topics divide the vegan community as quickly as feeding plant-based diets to cats and dogs. This episode lays out the strongest arguments on each side rather than picking one, with a clear disclaimer that this is not veterinary advice.

Vegans Explore Podcast

Episode 76 · Jan 15, 2026 · 7 min

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Cats are a harder case than dogs

Cats are obligate carnivores, and major veterinary organizations agree their biology requires nutrients typically found in animal tissue, most notably taurine, a deficiency of which can cause serious heart, eye, and nervous system problems. Commercial plant-based cat foods rely on synthetic taurine and other supplemented nutrients to meet AAFCO or FEDIAF guidelines, the same way many conventional meat-based cat foods rely on synthetic supplementation to replace nutrients lost in processing. Critics counter that meeting a guideline on paper is not the same as a proven long-term health outcome, given how limited large-scale studies still are. Most veterinarians do not recommend plant-based diets for cats without a specific medical reason and close monitoring.

Dogs are a more realistic conversation

Dogs are not obligate carnivores in the same way, and a 12-month study cited in the episode found healthy adult dogs maintained normal health markers on a nutritionally complete commercial plant-based diet. Anecdotes claiming vegan dogs live longer, like Bramble the Border Collie, are not scientific proof on their own, since longevity is shaped by genetics, veterinary care, and environment as much as diet. Brands like Omni, Bramble, and V-Dog are cited as examples of companies working to meet nutritional needs while aligning with vegan ethics.

Home-prepared pet diets, plant-based or not, can become nutritionally unbalanced without careful formulation and veterinary oversight.
Cost, access, and rescue-scale feasibility are real practical constraints raised by shelters managing large populations of animals.
The episode's one point of near-universal agreement: a poorly planned diet, vegan or not, is harmful to the animal.