What is wrong beside my Bearded Dragon?

I have had my Bearded Dragons for over 1 1/2 years. I believe they are both boys, they do not fight, own always been together (they are brothers), and after discussing with an expert whether they should be separated, I was told that if they get along ok, next it is no problem.
They live in a 4ft x 2ft enclosure, Basking lamps, UV table lamp, areas to hide and are very well looked after.
One have always been smaller than the other; however I am worried about the state of the smaller one.
I moved house 2 months ago (during the move they be subjected to the inside of a cat carrier for around 8 hours, but it was quite a hot day) and since after, he has been hiding in a corner, drinking little and sleeping a lot. The larger has had no evolution.
In the past 4 days they have both hidden absent and gone into burmation.
I do not know why he had slowed eating and is sleeping more; he is about 3/4 of the size of the larger one. I do not have a sneaking suspicion that it was preparation for burmation, as the larger one carrier on being massively active, and eating a lot.
Is it possible that, he have become stressed due to either sharing the vivarium with his brother, or the house move, or is there something wrong?

Answers:    this is commonplace for a bearded dragon. They do not hibernate in their first year, but when they get to their moment winter they start to slow down. They will enter a fairly dormant phase and not wake until the spring. It was a surprise to me when it happen, but they will wake up just fine in the spring, do a big poo and resume duration like nothing happened.

I dont guess the move will have helped, but it doesnt sound resembling a problem.
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