Interest in plant-based diets for companion animals is growing among vegan owners. Understanding the nutritional science is essential for ensuring pet welfare is not compromised by dietary choices.
The welfare question with plant-based pet diets is whether the animal companion receives complete nutrition that supports their health throughout life. For dogs, evidence increasingly supports that well-formulated vegan diets can meet nutritional needs — but the quality of formulation varies enormously between products, and budget options may not deliver on their nutritional claims. For cats, the obligate carnivore issue is genuine: cats evolved to derive essential nutrients from animal tissue, and deficiencies in taurine, arginine, or vitamin A cause severe and potentially fatal conditions. Owner dietary values are a legitimate consideration, but the animal's welfare must take precedence over owner preferences. Any plant-based diet for a cat requires veterinary oversight and regular monitoring.