A recent post from iflscience.com reinforces that human being should not enforce their ideologies on pets. Take a look at this post from 2014:
Vegans, please do not do this. Cats are not omnivores like us, they are obligate carnivores and cannot survive on a meat-free diet.
Edit: a lot of people commenting on this are arguing that the owners of this cat just “didn’t know what they were doing”, that protein is protein, and that any animal can survive on a vegan diet if done properly. NO. Cats are OBLIGATE CARNIVORES. They will die on a vegan diet. Some animals can do perfectly well on a vegan diet – dogs for example can be fed a vegan diet, if you’re careful. Cats ABSOLUTELY CAN NOT.
(Feature photo via Trapline Photography not of actual kitten)