New to Poms, lots of questions.

by Felicia
(Parkville MO)

Hi there! So we adopted a little Pom, his name's Buddy- 9 months old. Very sweet and affectionate. Well mannered, sort of housebroken but we're working on that. It's his behavior that worries me. I've noticed that he is very lethargic I've tried getting him to play and he's just not into it at all. Is this normal for this breed? I haven't heard him bark once, I'm almost wondering if he even has a voice. He is scared of everything even the wind blowing outside and sometimes cowers when I approach him or any adult for that matter. I'm hoping he just needs to get used to everything, but how long should this take and how can we help him come out of his shell. If he is in one? Also, what's good for doggy breath?
Thanks!