They are feathered its 30 to 40 during the day and 20 to 30 at night.I'm new to this,but after reading the thread about chickens in Alaska I'm sure I need no heat but I was just curious because of their young age,plus they are in the house, by suddenly putting them on the coop it would be a big drop in temp compared to what they are used to.any input would be great thanks. Oh I have six coop is 5 x5 and they are cold Hardy breeds