Dave, Sorry I have not got back to you. On the colder days in St Petersburg Fl AT 36 to 40 degree's they will stay in the shed all day, but even at 50 degrees they will come out for a little bit and then go back in. When the temps are low I put food inside the shed and they come to the cool end and eat. I just have to check on them 3 or 4 times a day to clean up after them.
But other then that there shed stay 75 degree's all winter long.

Richard