I agree with Kimberly, sounds like he was possibly abused in the past. How sad is that
With lots of love..sounds like he found the right home for that, hopefully he will get past that. It is also a good idea when new people come around him to have them pet him under his head..not to pat his head...have them put their hands under his mouth and nose to smell...
Bless his heart, I wish him and you all the best
Pictures??