I have a dog that is 1.5 year old pit bull. I know more about pitb ulls than 90% of people in this world due to writing papers overthr breed. I would go toe to toe with anyone who says they are a aggressive breed. Anyway,my 1.5 year old pitbull is great with my family and would never hurt me but for some reason, i cant find why, he will randomly bite people who are petting him. He has done it about 3 times and it breaks my heart because I just want him to stop. I work with him every day and teach him a new trick every week. I love him more than life but i.need him to stop, PLEASE HELP ME. Oh and I have had him since he was a puppy so he was never treated bad or used as a fighting dog.