I noticed some frost on the inside of the coop last night, but now all four walls have frost. I also noticed the ladies have a little frost/ice/moisture on their backs. It was -10 w bad windchills overnight, and the coop is not insulated. They are not as perky, but the nest box was full and they are pecking around. The temp in the coop is 0 degrees. Anyone else experience this with the frost? i am assuming the moisture is building, thus the frost.