If a cat or dog is eating vegan meals, they’re doing it out of their own free will, just saying. Give a dog a piece of Tofu turkey and they eat it, i didn’t force them to eat it, so.
Give a dog anti freeze and they’ll eat it. Feed a dog rat poison and they’ll eat it. Give a dog grapes, nuts, chocolate, beer, etc. They’ll eat it. They don’t know that it’s dangerous for them. As their caretaker you are responsible for knowing better, not them. If you deprive your cats or dogs of meat, especially cats, you are actively killing your companion in the slowest way.
I once adopted a kitten who was being systematically starved by his previous human who insisted in feeding him vegan food. He was so excited when he got meat-based cat food from us that he gorged himself until he puked. He was left with digestive tract issues for years because of his previous human’s neglect. Do not do this. I don’t care what you believe in personally – cats are carnivores (not omnivores), depriving them from meat is cruel and animal abuse.