He might chew alot of things because he hasn't really had a chance to be in a house/family environment so he needs to learn, and as far as the eating goes if you just got him he probably won't eat for a couple of days because he is trying to get used to his new living conditons. I wouldn't worry about it too much give him a few days and he'll probably start eating.

Welcome to pet talk by the way, I hope you enjoy being here. I have 4 dogs.