I adopted a 4 yr old pitbull about 2 mounth ago. He was starved and in very bad need of medical attention. Ive nursed him back and hes starting to get back in shape but it seems that he was never really socialized and doesnt know how to play. If you throw a ball he ducks down like you tried to hit him and he wont pull on a rope. I would like for him to be normal and happy any advice is greatly appreciated.