I'd give it another shot in a few days. It's not really time to worry yet. You might also try letting it thaw out on it's own and then warming it up. If you are buying the frozen mice in the bags from Petsmart or something like that, just set it on top of the enclosure for 3 hours or so until it's thawed completely. Then warm it up and feed. I think it's comes across more natural when its not wet.