A SnuggleSafe is a disk you heat in the microwave, to release heat over the course of the night. Obviously it would not heat the entire coop, but I am thinking of hanging it or making a stand so that it would be available for snuggling next to while the birds are sitting on the roost. I have read about people making an extra "hen" out of a ceramic flowerpot with a lightbulb inside - this would be a similar concept but without electricity actively in the coop. http://www.snugglesafe.ca/ Any opinions? Available online for around $27 including shipping.