Can dogs survive on a vegan diet? The co-evolution of the domestic dog alongside their human companions means that although dogs have carnivore anatomy, they have evolved some nifty adaptions for living alongside people and scavenging our scraps. However, dogs still need an easily digestible diet that is rich in protein so that nutrients can be rapidly absorbed into their bodies. For this reason, vegan dogs will struggle to digest the high fiber of plant-based diets and are at risk of vitamin D and B deficiencies. In one study of vigorously exercising dogs, those eating a plant-based diet showed damage to their blood. The blood remained normal in meat-eating dogs.

In the UK, cat owners who feed their pets a vegan diet could be prosecuted under the Animal Welfare Act - in which the punishment may include jail time.