he sounds perfectly normal to me.... mine hides all day every day. every once in a while i will catch him drinking water or he may just poke his head out when i walk into my room to see whats going on. i honestly wouldnt worry about it. sounds like he is settling in just fine. but like the previous post said... make sure he is not dropping too much weight. BP are picky eaters, mine had been on an eating streak for about 2 months and i tried to feed yesterday and he wanted nothing to do with the food i was offering.