Hello! what breed mix do you think my new puppy is? the previous owner said that he was a pitbull mix but they didn't know the other half. However, they were not good owners and I do not trust them. I have been looking at a lot of images and breed info and think that he may be more a boxer mix (maybe boxer/ american pitbull??) He has a very very slight under bite which is a boxer characteristic. He is four months old and his 31 lbs. What do you think!?