Recently during research, I found this site talking about the behaviors of animals which could follow on after animal abuse. I think this website opens up a bunch of new consequences of treating animals badly.
Animals are not the same as us and they would not like it if you hurt them so they will try to defend themselves. Since we attack them they will give it back and the website states that it is mostly becoming aggressive to show you that they don’t like it. This consequence mostly happens with domestic pets such as cats and dogs, because we interact with them the most in a bad way or a good way.