Having pets is human interference. So is killing for your pets. Where does it stop???
I agree, and good question.
This is a question that I used to ponder quite often. The answer that I've best been able to figure out is this; It stops with us (vegans, and AR people).
To further elaborate; We should be the ones who stop purchasing companion animals, and do not support the breeding of non-human animals for human "use".
There is a big "HOWEVER" included here. Because humans are directly responsible for the surplus of companion animals that have been brought into the world as a result of humans breeding them, abandoning them, etc... we (as vegans and AR people) should also take on the responsibility to open our homes to these animals that need rescuing. We can't un-do what breeders and pet stores have done to the animal population, however we can take in ones who need homes NOW, without adding to the demand for new companion animals to be bred by adopting animals from shelters, rescues, etc.
I'm also going to go out on a limb here and say that we should try as much as possible to veganize our companion animals -- dogs especially. As far as other non-human animals are concerned, I certainly wouldn't fault an animal for being born a carnivore, and not being able to thrive on a vegan diet. Does that mean that a cat can't be a vegan?? Probably not. I've seen plenty of vegan cats that thrive. I've also seen plenty of vegan cats that fail to thrive, and wind up with urinary blockages, and other health problems that can be a direct result of diet.
I have two rescued dogs who are both vegans, and gleefully chow down on every single vegan meal that I prepare for them. On the other hand, I have two rescued ferrets, who I reluctantly purchase a meat-based food for. I can't fault them for having been born carnivores, and there's literally no way to veganize a ferret without serious health consequences (to the best of my knowledge). I suppose it depends on the animal.
I guess what I'm saying is this; We as vegans and animal rights people should step up to the plate and try to right the wrongs that have been done to companion animals by the pet industry, etc. and open our homes to rescues as much as possible... that way, we're helping to right the "human interference" as much as possible.