Its going into the 20's here as well I was concerned about the chickens too. We put heat lights in the big coop and we also put up a big heat lamp in the banty coop There do not go indoors at all they roost up high on their perches I put the light on anyway as I figure that if they get too cold they can get under the light They have been OK so far but its colder tonight. Our smaller coop doesnt have electricity running into it. The chickens wer OK last year and it got down into the teens a couple times I worry more about our tom turkey he will not go inside he had a big house but never used it. We turned it into aduck house now he has a big dog house I put a light up for him too lets hope he will get in out of the cold.