I purposely purchased Rhodies and Plymouth Rocks because they are hearty breeds (plus I'm a New englander!) bred for the cold. Today was the first time I went to the coop/run and they were in the coop (VERY cold and windy today). I have a homemade heater that keeps their water from freezing. I am going over to put some petroleum jelly on their comb/wattles. It is supposed to get down to -1. I have covered their windows to prevent the cold wind from coming in. I guess I know that they are fine because every time I check them when they're on the roost their feet are warm. I guess I just need reassurance that they are okay in the cold. I think I am doing everything I should be doing and from all I know they really don't need a heat source. I guess I am wondering if there is anything else that might be good to do or if I've done everything I can. This is their coop sans run...sans snow!