She is scared. She was taken from her mother and is to young to understand. When we got our two pups, I had to sit with them on the floor with them in my lap and hand feed them the first time. Speaking to them in a low comforting tone, tell them that they are safe and well and will be taken care of. They will not understand your words but they will understand the comfort. The second day I put the bowl in front of my legs and placed them directly in front of me by the bowl and coaxed them to the food. They both eventually ate. If the dogs refuses to eat after two days call a vet and get some advice. At this point anything could be wrong. Was the pup just with it's mother and siblings or from a pet shop. If from a pet shop the pup could be sick. Try the love and coaxing first, watch for signs that the food isn't agreeing with him. Call a vet if the dog doesn't start eating by tomorrow. Good luck.