Veganism is based on anthropomorphism, which is the practice of applying human traits and behaviors on animals. When animals are anthropomorphized, their basic physiology and behaviors are not recognized or honored. This practice puts animals at risk and threatens their health and welfare.
Before discussing the notion of whether a vegan diet is appropriate for a dog or cat, one must understand the physiological and anatomical differences between species and how they have evolved to eat the diets they do.
Evolution, Anatomy, and Diet
Vegans like to assume, as well as persuade meat eaters, that humans evolved to eat only plants. This is not the case and our dentition as well as our gastrointestinal tract are proof. Herbivores, those animals that only eat vegetation, have flat, wide molars,