Right now I only have two chickens. Unfortunately one passed away this last summer. The inside of their coop is very small, it's one of those store-bought put it together yourself cheapie things. Don't worry, next year I am going to build a nice big one. But anyway, I don't have any electricity run into the coop so no heat etc. With three chickens I felt they could keep themselves warm but now there's only two and they are doing their first big malt. It is going to get down in the teens the next few nights. They have 6 inches of pine shavings in there but are they going to be warm enough? Should I bring them into the house? How cold is too cold?