I kicked a dog
Don't you think kicking a dog is bad?
Bad is anything that's not me.
Animal cruelty is a psychological problem that could lead to more serious behavior against humans. Seek help from a professional and try to  rid yourself of these urges so that you don't get in trouble with the law.
A: It's just a dog. B: The owner is lazy.
It doesn't matter if either it's just a dog, or if the owner is lazy. Dogs have emotions and can feel pain, and it's not its fault that their owner is lazy. If you continue to justify your violent actions, you may end up going down a path that you'll regret.