We recently were gifted with a Pug, Chow, Pitbull, and Shar Pei mixed puppy at Christmas. He is now 4 and a half months, and seems very intelligent and was easily house trained and can do tricks such as fetch balls, tug of war, sit, etc.
The only problem we have is that he becomes very aggressive when strange men come to visit, barking continuously, acting as if he may bite. He also always barks at anyone in the neighborhood if we let him sit on the porch. He doesn't stop when we tell him
The more you socialize this dog the better. Have people come up to him and offer treats. Also have people pet him and play with him. The more you do this the better. Vetcare