Fuck Animals. They're mean and some of them bite.
That's how i feel about fags too.
Actually though, it's a complex issue. If animals are raised right, the fact we eat them leads to their existence. So stopping meat eating of every kind means many animals won't ever exist. This would of course be devastating for meat eating animals like dogs and cats and other pets.
So the real issue is cruelty. Minimizing the suffering of the animals, making sure they have a net positive life.
Same goes for the glue and leather and all that shit. A problem with this will of course be cost, and will of course be the governments ability to regulate so people can't cheat and other countries can't flood ethical markets with un-ethical products.