I just got him, and he seems a bit lethargic possibly depressed? he was the last of his litter and they seemed to have had him in a cage outside by himself. He does seem a bit scared but i assume thats the new environment, and he walked around the apartment a little bit before just laying down on his bed. we were able to hand feed him a little, but i can't get him to drink water. It's my first time with a puppy as young as him my other dog we got at about 3 months old. I want to make him feel at home and happy but I'm not sure how to proceed. Should i let him be and let him get used to the environment, or keep trying to pet him and warm him up to myself?