As the other user pointed out: it is equally insane to feed a cat tuna, beef, pork, etc, that has never been a part of their natural diet. Most cat food is equally artificial and ‘lab-produced slop’, unless there’s a cat food out there made from mice and birds. Both kinds will have to do the same amount of research to make sure that it will actually fulfill a cat’s dietary needs. The vegan one just causes less harm.

Also, reported for being a jackass.