Hi, My little boy is 9 months old. He has been neutered, and gets plenty of exercise and play time. My problem is he is wearing me out. He never stops, he's into everything and when he isn't, he's growling and barking at me. He wants all of my attention all of the time. When do you think he will mellow out. Is there something I can do to calm him down a little bit. I've tried to train him but have had little success. He's just too hyperactive!