It was close to -10 this morning. I brought the girls' food and water down to the coop and I heard them hop off the roost, they all came out in the run to see what was going on. After I was done they all went up to the coop until about 7:30. They've been in the run ever since. They roost and cover their feet for a while, then they hop down and eat and scratch. When they get cold, they hop back on the roost. But so far nobody has gone back into the coop to stay. The coop stayed above zero overnight! When I checked this morning, it was +8F in there. I feel so sorry for them, they're all puffy and they don't look happy, but they are dealing with it. I don't have food/water in the coop, so they do have to be out to eat and drink.
I would love to make those little hats for the girls. I'm still working on hen shawls, though.