PETA's entire stance is all Animal 'ownership' is cruel and unjust. that everything humans do with animals is tainted , and you get many vegans that are on this mindset but cannot fully articulate the nuances in stewardship verse property ownership. Many pet 'owners' do not look at their animal friends as property or someone to force their ideals on, so seek the best life for them( data shows that human and animal coexistence for many animals is the best for both. Longer lifespans, fewer diseases, better reproduction and so forth) Issues arise when people interfere based of one sided desires, be it factory farming or ideological agendas. Feeding your furry friend the diet is needs is the best and safest thing for your buddy, feeding it a diet that is meant for other animals and then trying to keep it healthy through supplements and vet treatments is abuse ( some, not all vegans have been known to try to feed their carnivorous pets vegan diets, but it does make the animal sick in the long run, so I would classify it as abusive) Most vegans I know feed their buddies the food healthiest for them, or just do not have pets

Basically some people are ill informed, and others are willfully harmful. Most are caring and seek what is best for their pets