I have a 7 month old labrador. He was a biting monster from the beginning. Vet told us that it's his early stage and he will be fine. But for past a month he is just fighting everything we say. He is biting my wife even when she goes to pet him. He just want his food & chill. He does not let us pet. He just injured my wife where her finger became blue from the bite force. I have a toddler at home. The dog was good with him but recently is not even liking him. What should I do? He is in great health & shape