My little Titan is now 5 1/2 months old. He used to bite a lot as a younger pup, but now his full size teeth are coming out. It's no joke anymore. I think the root of the problem is that he doesn't respect me anymore. He doesn't see me as a pack leader, He's always tried to take that role from me. I thought I was doing a good job, but I guess I wasn't. By the time he was 8 weeks I had him taught how to sit, paw, come, stay, down, jump, and bark on command, etc., but now he only does it when I have a treat in my hand. If I give him any command he doesn't want to do he'll bark at me almost as saying "I'm not going to do it, try and make me." I've tried to tell him "no" with a strong tone, I've tried putting deodorant on my hands to see if he dislikes the taste, I've tried biting him, growling at him, I've tried leaving him alone when he starts that, crating him when he refuses to obey, etc. I'm out of suggestions. I play with him a lot and I think he doesn't see me as a master, but as a play partner. I'm out of ideas and I can't take it anymore. I can hardly pet him because he immediately tries to bite and play. I even tried sticking my finger under his tongue and making it uncomfortable. Please help! I need ideas.