For chickens in the wintertime, we've added some insulation to their coop, while assuring there is adequate ventilation through the lid that opens from the top. I hear a tightly insulated coop does not allow the ammonia and other natural gases to build up inside the coop. I've done the heat light sparingly for the coldest nights (and days) When it dips below tens degrees or when I notice the chickens aren't coming out of of the coop because of the cold, wind, or snow. I make sure to have at least one area in the yard that is covered for them to dust bathe that is clear from snow and also a place where they can eat and drink where it is dry. For feed, they get some grains, layer pellets, some scratch, kitchen
compost. I think the layer pellets are 15-20% protein which keeps the chickens energized.. In the winter, the egg production seems to slow down a bit, but it seems to make sense that the chickens are using more of their energy to stay warm than to produce eggs. Like Jen from the last post, I am presuming that this is the case. I don't know any of this to be true beyond my own experience. Oh yeah, and make sure to visit your chickens when you pass through the yard or when you can. They like the human interaction and I've heard that is one element that helps with egg production and general well-being. They are not just egg layers, they are our jurassic pets.