Mr. O trained my sons pitbull awhile back and I was totally amazed! He did the one day training and when we got back his dog was a new dog. He went on to do shows with mr. O at the convention center and to this day he is very well behaved. I attribute this to mr. O and his training. My son gets a lot of compliments on his behavior as Pitbull's have a bad rap to begin with. Also mr o follows up with you if you have any issues after the class. As far as him being abusive to dogs that is unheard of this man has so much compassion for dogs. A lot of people have annoying dogs or dogs that misbehave and refuse to work with them and accepts their behavior. Mr O will teach your dog the simple commands and your dog will respond in a way that will amaze you! Best money we ever spent! Love Mr O!