Morals of meat treatment seems to be a vast whirlwind of inconsistency that I think largely stem from people know having a full understanding of how their meat gets on the table. I've grown up rural enough to have butchered a few animals and can easily talk about it while at the dinner table, but many people seem to have this extremely strong line between the animal and the meat, and even if they intellectually known they are related, it isn't emotionally connecting.
Probably not many out there. Which is funny since it would seem at a distance to come from the same instinct. My best guess is that it's political tribalism that creates the split.
If you're already eating meat, you're already demonstrably OK with the killing of an animal.