Welcome to the club, Murphy will be 5 months the 1st of June and is a little maniac with teeth too. When he starts acting like that we have had luck making him sit and then start talking to him real calm. It seems to work a little. The problem we are having now is that he is getting stuff off of the top of cabinets. That is the next thing we need to remedy. Also in the evening I have been playing in the house fetch with him that seems to tire him out pretty quick. Good luck let us know what ends up working for you!