I'm starting this subject because so many of us are concerned about our chickens in the winter. In particular frostbite on the comb. A friend mentioned to me that years ago when they had chicken tractors that they put a 60w light bulb in an enclosed paint can and that generated a lot of heat for the small coop of a tractor in cold winters. He said that the can would nearly burn you if you didn't have it vented some. I was thinking about that and how to possibly incorporate that into a roost design. Here is what I'm kind of thinking... build some sort of frame that can be suspended from the rafters or other means and a paint bucket in the middle radiating off heat. Some sort of a hood would be good to have on this as well to help hold heat down. Please forgive the crude design in paint Do you see kind of what I'm thinking? The chickens would roost all around the paint can. You could also expand this depending how many chickens you have. Thoughts?