i do know for a fact that none of the pittbulls that i had taken care of have .never had harmed anybody.they all was too sweet and loving to do so.their names are Jada,Sid,Pancho,Chaos,Sabbath.Sid died as a puppy and an older dog grabbed him by his throat he never played rough with me.Jada is very sweet and loving.and the others never had hurted me or my family.