One winter, we had a warm spell and lots of flooding, due to rain and snow melt. DH was out back, digging around the outlet for the cellar sump pump. He dislodged a hibernating frog, who started hopping around. He brought the frog inside and we called Clyde Peeling (Dana!) who told us the frog wouldn't go back into hibernation and if we let it outside in the freezing weather, it would die. So we kept it in an aquarium for the rest of the winter and fed him crickets and meal worms. We let Mr Froggy go in the spring.
I know, that doeen't really answer Dana's question, but I thought it was a good story. Dana, you could try calling Reptiland with any questions. They've been helpful for us with a couple retile related questions. You can get crickets and mealworms at pet stores or bait shops.