I normally keep my chickens in their coop once the day get too short for me to get home before its dark. I am not concerned about the cold and the chickens as their coop isn't heated either. I find that the chickens are too easily confused and "hide" when it gets dark and I spend far too much time looking for the little buggers. Making my chores as easily as possible is something I spend far too much time on. But with Wednesdays unseasonable warm weather I felt mean keeping girls (currently all chickens are femail laying hens) cooped up in their coop. Lucky for me the poor things didn't venture to far and all were home before it got dark
Here's one of the older chickens peeking her head out.