Didn't you have to pay for the cremation of the dog and all that? Something about you decided to pay it just to have it all end, if I remember rightly . . .
Well, I hate to say it, but this is often what happens when you don't fight for what's fair and right from the beginning. People with no sense of responsibility tend to not realize when they have gotten more than they deserve, and will take advantage until you put your foot down. Please countersue, please get back from him all your legal fees, all the money you previously spent as blood money, plus some more for to make up for the trauma he has put you through. Until you slap it, this mosquito will just keep coming back.