Hi There I have 22 week old pitbull, He has had 2 other dogs to play with for about 2 months, Since I have moved about 2 weeks ago He only eats half of what he use too and only wants to sleep, I still socialize him with other dogs and he is active while playing with them but as soon as they leave back to sleeping, and also he seems WAY to calm to be a puppy! What should I do?