My dog is only 3 months old, a pittbull, I just got him 2 weeks ago AND He was fine last week BUT He ended up at the pound because of certain circumstances , I got him yesterday, but he is not feeling welL He is very week and just wants to lie down ,He ate a little, I took him to the park, but he did not wanted to walk, Can you please, please help me? WHat can i do or feed him?