True, no animal consents to being eaten, and I understand veganism is meant to eliminate or mitigate unnecessary animal products from one's diet, but I don't think "no animal consents to being eaten" works here. That's nature (and yes, I'm ignoring that humans are part of nature, despite our best efforts to think we aren't), you can't change nature. You're not going to get a lion or a shark to stop being a carnivorous predator because that's just what they are.

I also don't necessarily agree with your knife argument: a serial killer does not need to kill to survive, whereas living things need to eat to survive. I don't think the consent argument is as ridiculous as that, I would more equate it to an infirm cancer patient being given chemotherapy drugs versus homeopathy treatment. They can't consent to either, but one is clearly meant to try to fix the issue, whereas the other is a personal choice.

Veganism is a personal choice, cats needing meat in their diet is not. I have nothing against veganism, and I appreciate your arguments (I hadn't considered the "not consenting to be eaten" aspect). Idk, to me, people who force their diets/lifestyles onto their pets that aren't equipped for it, it's just... Immoral? I'm blanking on the word, it's been a long week.