Vegan-based diets for pets are gaining in popularity as some vegan owners are deciding that they want their pets to adopt a similar diet to their own. Mainstream public opinion, including other vegans, hasn't offered much support, given the fact that dogs are omnivores and cats are carnivores: some require nutrients not found in human diets, vegan or otherwise.

Despite this fact, some petfood companies have made their niche selling vegan petfood, such as the Minnesota-based,  Evolution  and Canada-based,  Medi-Cal Royal Canine .

Some veterinarians are skeptical of the idea, pointing to the fact that owners and their pets are completely different species; each requiring their own specialized diet and nutrition.