Quote: Plenty of options there for keeping eggs from freezing. The nest boxes COULD be insulated. That could be as simple as a cardboard lining, and extra hay, which does a much better job of keeping those eggs warm than shavings do. Also, it's helpful if the girls share a nest. That way hens are warming the eggs that were laid previously. Some people use seedling mats, or something similar to warm the nests. One ingenious flockster pumped heated water (from his heated bucket) through PVC pipes that went under the nest boxes for the nipple waterers. That would not work in my cold, but it worked for him. It's also helpful to have the nest boxes inside the footprint of the coop, instead of hanging off the side of the coop.