Just as an idea, go talk to ur local animal shelter & see if an agression program can be started. it'll also help tame some of the stray dogs at the shelter... I helped a hyper bitting lab to stop bitting, through the use of a muzzle, she wasn't mean, but I guessed her old owners played with her mouth too much. It took my 2 days to teach her that biting is wrong, I also taught her to sit, stay, come & shake both paws & to get down when she jumped up... I also used cheezy dog treats to show her how good of a girl she was. & evey time she forgot not to bit my hands, I would stick my thumb into her mouth & push on her toungue, which she didn't like, duh, but it helped as well. The only dog I failed was a putt bull gone bad. He was the sweetest dog there, but Ihad to stay away from him because he loved me toooooo much & he would bite me hard & pull me closer to his dog house, he had become jellous (sp) cause I was working with other dogs & not just him... He bit me so hard on my arm I had 2 quater sized bruses (they were black as can be), but he wasn't mean, he just loved me too much & it hurt me to have to stay away from him... but he was sent to putt bull rescue for xmas