Thanks for the advice. I know all about the cool side and basking side but I didn't see an issue w/this. He basks on both sides but usually on the left hand side of the picture (the temp got blurred when I downsized the pic but it should say 104 F). And on that side there is a large overhand. So under the overhand it is cool so he can also go under there. Only the top half of the left side is hot.
In terms of weight, he actually gained weight while not eating. Strange. I weigh him once a month but since he's slowed his eating it's been twice a month. As for foods I've tried everything, silkworms, horned worms, roaches, wax worms, repti/phoenix, and supers. His staple is usually roaches and supers. He did eat a bowl of repti-worms a week ago but since then nothing. Veggies are also plentiful. He usually likes turnip greens but I've tried mixing in mustard greens, cactus pad, fresh grated squash, and carrot shreds.
I don't think it's parasites b/c I had him checked less than a year ago and we keep his cage very clean and he doesn't seem interested in his poop (I know some beardies like to eat or lick the poop) once he does his deed. I'm really hoping it's brumation and he snaps out of it. I'd hate to bring him to a vet and get stabbed w/needles and such if nothing's wrong.