OK,

He'd been hiding out a little more these past couple days. Came home and found him out on his warm side of the tank. He'd left a rather large bowel movement outside his hide and when I lifted up the hide to look underneath, there was a large piece of shed skin.

Mostly one large piece with another smaller piece. I'd estimate about 90% of it came off in one single shed.

Looks like things are working as expected now.

About how fast does a BP grow now that he's being fed properly?