My Pullets have been outside in their coop with no heating lamp or light, but its suppose to go down to -10 or so with a lot of wind tonight & remain very cold tomorrow so I brought them it & fixed them a spot in the cellar. I have the 4 of them in a large wire dog crate with shavings in the bottom. I also put a blanket over the crate with one end left uncovered. I put the wire dog exercise pen around the crate so that if its still real cold tomorrow they can stay there. The cellar is very cold, but it warmer than their coop. I might have over reacted. I know some people say that they would be ok, but I wasn't sure.
Herself