Tonya,
This BOYfriend of yours IS an abusive personality, to say the very least There may be things that you do not know about him or maybe you do. He will not get better unless there is help for him and HE sees he needs help. He is abusive to you even though he might not have actually struck you.............yet. He sounds VERY immature and you are the one who has to decide whether you want to hitch yourself to his wagon, so to speak. You are not married to him so you are free to leave, even IF you WERE married to him you are free to leave. If he mistreats animals for whatever reason he can't be trusted with them. Who knows what he does to them when you are not around.

He sounds as though he does or could have an explosive temper at times. The way you describe it doesn't sound as though he treats you very well either. I would keep the dogs. Does he have any proof that HE has ownership of the dogs? Are they AKC registered or a bill of sale with his name on the papers?