Claim: The carnivore pet prefers meat and therefore feeding them vegan food is stupid

Details

"Hey look at that video of that lady who convinced herself her dog lost preference for meat. Wasn't it hilarious when the dog went for the meat over the vegetables she was feeding him? This just proves that dogs need meat to live."

Problems With This Argument

1. Self-destructive habits exist

Humans eat themselves onto the show "My 600-Pound Life". Animals famously will lap up antifreeze to the point where it's used as a popular saying. Is what an organism prefers really indicative of what is good for them? Probably not. So there's not a great correlation between immediate gratification and healthfulness.

2. This is really just a few bad arguments rolled into one

• Vegan said/did silly thing X. This invalidates veganism
• Dogs need meat, biologically speaking
• Lions (or in this case, dogs) eat meat. That justifies my carnism

Dogs might prefer meat, but that says nothing about dog health - and even less about human health. And neither does the fact that some random vegan once made a bad argument for veganism.