Mine live outside in an unheated coop just like the rest of my chickens. Always have, and they're none the worse for the wear. We had a couple inches of snow yesterday, and have had temps in the teens and twenties the last couple weeks - they've got places where they can get out of the wind and weather tho, and I keep their coop and nestboxes as dry as possible. After back to back blizzards dumped almost 4 feet of snow on them last winter and took a month to melt away, this weather is a piece of cake for them!