2 husky brothers

Question
I have 2 Siberian huskies. They were from the same litter, we have had them since they were 6 weeks old.  They have always been yin & yang (always together, always playing, sleeping everything together).  We have recently moved house and since being there one of the dogs has become very unsocial.  He will not play with Thor at all and spends all his time sleeping and hiding in a hole that he has dug in the garden.  He is still enjoying his walk every day and comes out to eat, but that is all.  He seems to run away every time Thor goes near him.  This is very unusual behavior and I am very worried about it.  He has always been a little scaredy cat but since the move he has been worse.  We have a door downstairs that slams a bit when it closes, this absolutely petrifies him every time and he will run around to the hole in the garden and hide behind the hedges.

I really need some advice here, I have taken him to the vet to be checked out.  He is getting blood tests on Thursday to see if there is any thing internally wrong with him.  

Answer
This is a tough one, but you are doing absolutely the right first thing in having the vet check things out.  Strange social behavior can be a sign of other problems.  The adjustment period for the dog can be tough in a move, but if the rest of his "pack" is there (which includes his brother, you, and everyone else in the family) it should help.  Was anyone removed from his "pack" in the move?  This can also be a source of problems.

Failing any medical problems or loss of someone his family, the important thing is to let the dog adjust and give him time.  Keep in mind that dogs are conditioned response animals and follow their owners lead often.  Don't support the behavior, and encourage other activities.  If he goes and hides in his hole, go out there and give him a treat to come out and play.  If he gets scared when the door slams, ignore it (or verbally berate the door for being so loud).  Don't comfort the dog though.  It's a little counter intuitive, but you don't want to support the detachment.  Instead, you work around it and ignore it.  Also, keep the dog on a leash for a while to help him get used to being near you, and everything is ok.  So when that door slams, he can't run away.  Instead, he learns that you are fine with, he probably should be too.  I'm not a big advocate of treat based training, but in cases like this it might not be a bad idea to reward the dog with treats and such for working his behavior patterns out with you.  (Staying by you and not hiding, or coming out from his hole in the garden, etc.)

Hope that helps some and feel free to write back if you have some other specific questions that you might need some advice in dealing with.