Hi,
I'm new here too so welcome from one new person to another. Your post caught my attention big time and I have to respond, first to echo the previous replies to find a f2f therapist as soon as possible. A professional can help you in ways that your peers cannot, even people who have experienced the same type of abuse.
You're very right- his thinking is not rational, for whatever reason. I'd bet money that there's something much deeper going on inside him, something only a professional would be able to help with.
A little dog is innocent and unwilling to fight back against such abuse, but you said one thing that literally jumped off the page at me. Though I understand where you're coming from, saying "I can handle his abuse" is something i've heard many other abused women say..."i can take it" but why the hell should you? You don't deserve that any more than any other person, child or animal.
Please take good care and be safe