We could slaughter them in more pain free ways, but it doesnt’t change that they don’t consent to be killed. Thats sort of a non starter for vegans.
They already are supposed to have clean living conditions and there are penalties for animal abuse, they just are rarely reported and punished.
I think the problem I have with regulation is it rarely seems to work out when we do get regulations. They are written deceptively, and then aren’t enforced.
I suppose that doesnt mean good regulation is impossible but its part of my reluctance.