My 2 Fowler's toads that I've have since this past July as toadlets, go underground for a few weeks, come up, pee, eat and soak then go back down. I'm in NC and we're having a real mild winter, yet they still go back underground. I run the lights 12 on 12 off, night temps around 65, day temps around 76. I suggest offering them something to eat, make sure they have water to soak in and see what they choose to do.