I dont want to get into the moral argument of feeding your cat vegan food. Leave that for another forum. The goal here is, if you do choose a vegan diet for your cat, to make sure your cat stays healthy. Let me warn you: a vegan cat diet is going to be expensive (especially during the first year when you need to check your cats urine pH and have more frequent vet checkups). If you choose to make your own vegan cat food, it can also be very time consuming. But, if you go about it correctly, your cat can be healthy on a vegan diet.