I have had my cwd for over 2 years. I just upgraded him to a 40 gallon tank and he's moving around being active as usual. Before moving him to a new tank I changed his diet from crickets to comet goldfish (which he loves) and he will only kill crickets if I put them in the tank, not eat them. When I upgraded him a week ago I put a single goldfish in there and he ate it happily. Then a couple days later I put two in there. He ate one and let the other die. I let him be for a couple days and last night tried to feed him again. He has not touched the fish and acts like they aren't even there. I'm super concerned because even though we've moved around a lot since I got him he's never had issues with eating. His color is great and he's still energetic but his belly is sunken. Any advice would be thoroughly appreciated! Thank you!!