its all in the mind, i thought it was cold everything frozen but where were my indian runners and geese, in the stream swimming quiet happy, they dont feel the cold like us since most of us lost our hairy coating, , my hens are still perching outside every night, thats what they choose, adult birds dont seem to need heat. i have a brooder lamp on in my youngsters shed but i leave the door open and they are outside most of the time