At the shelter he was labled as a Tosa Inu. I highly doubt he is anything of the sort, but it made it so we didn't have to jump through hoops to adopt him since Pitt's/mixes have special rules apply to their adoption here. I believe he is a lab/pitt/shar pei/akita, but who knows? All I know is he is wonderful and beautiful. He has a chewing addiction, we have probably bought him 10 chew toys already and cannot leave our shoes around. I am hoping it will go away as he ages since he is only 6 months old. He is incredibly smart, he learned to run beside us as we bike within only about ten minutes, and not to cross the path of the bike within twenty. We are working on getting him to come when called, but he is showing signs of vast improvement in that area.