Some cats seem to do OK also on a vegan diet. I think male cats have more problems than females...?
, I don't know of any successful exclusively vegan cats. They may do okay for a while, but eventually succumb to illness.
Also, many people who claim their cats are thriving as vegans, allow their cats to hunt outside; so they really aren't vegan. They easily find mice, squirrels, and birds
The controversial part for me is, while it is the nature of cats to hunt for food, domesticated cats are not living in their natural habitat. They are hunting and causing destruction in areas and to animals in areas where they don't belong.
This has caused some problems in certain places with species being decimated. Introduction of non-native species to an environment has been and continues to be a major problem all over the world and, of course, it's pretty much our doing.
It's hard to weigh the ethics of being vegan with the natural order of things. I mean, we're interfering with nature, no matter how you look at it. The cats are here, so we have to deal with it; and since we decided to domesticate animals which we had no business doing, we have to take care of them as best we can. It's not going to be good for our veganism; but this is one instance we have to compromise.
sorry, if I'm unclear; can't seem to find words today