A fecal is when you take his poop to the vet to see if he has any parasites. I've had two with parasites, the two were Redrock and that was August of 07. Speedy was this last October. They both had pinworm eggs.
If your male has any parasites that can cause problems when they brumate. If they brumate with parasites, they will loose a lot of weight and that's not good during brumation. If they don't have parasites, it's good. Basically, I think your beardie is trying to brumate.
I know it's scarry when they don't eat. That's a part of being a beardie owner, worrying whether there is something to worry about or not. Here is an article that Denise Bushnell wrote about brumation. It will give you a better idea about it. Basically, if a beardie is still a baby and is trying to brumate, there is probably something wrong. Since your's is 2+ years old, as long as there are no parasite issues, he should be fine.
http://www.beardeddragon.org/articles/brumation/