I adopted/rescued him from a couple that locked him in a room for 3 mths because the other paired pitbulls we're attacking him, the male intact and female pregnant,he was 10 mths old. He had intense car anxiety and training was always a fight because he would get hyper excited and nip at me when trying to give treats, so I moved to using a ball and that helped. To this day he still gets over excited and will attack me to get the ball back, so I limit his play duration.