We have a bunch of girls molting right now. Temps are around 30 during the day and around 20 at night, sometimes colder. We cover the windows and the pop door on the coop on colder nights but leave it open when the temp is above 25 - 30 degrees at night. Last night it got down to 26. Today we went out to check food and water and get eggs and our molting Barred Rock was dead in the coop under the roosting bar. She was nearly bare yesterday when I saw her eating and drinking. She had no injuries and since it was around 40 degrees today she wasn't frozen, just stiff from being dead. Did she freeze to death last night?