I do everything you have mentioned. I realize it has nothing to do with his testorone. I have trained 4 dogs now what I am doing with him is when he decides to jump when going for a walk he is verbally reprimanded. I have never used my hands to play with he has blue and yellow balls only colour dogs could see and when he decides to go into munch mood I give him his chew toy. He had been born October 21,12. His father is an A.K.A registered Mastiff and mother is Labrador black. Both are used for breeding purposes including the cops go to breeders home with their dogs to train. I have an intelligent dog he learns quickly the munchy part going to take allot more training on my part. Thank you