Also, recheck your temperatures and add a paper towel roll hide that is stuffed with paper towel in one end so that there is only one way in and out. Don't handle him until he's back on track feeding regularly too. After 1 week, offer fish scented extra small f/t pink mice on the lid of a closed deli cup with a few live guppies or minnows inside the deli cup. Only use a very shallow amount of water so as the live fish in the closed deli cup will flop around and stimulate a feeding response.