Why not just enjoy your dogs personality and treat him with love and kindness? Dogs are the most loyal domesticated animals on earth that deserve all the respect and love we can muster to give them. All dogs will guard their owners if they respect you and think you are a part of the pack. And just for the record I believe the Pitbull breed needs to be retired for good. There are too many instances of them harming and killing other dogs and people including their owners and small children.