We have had our chickens outside since late May-ish. We would lock them in the coop overnight but as the summer got warmer they started roosting outside in their run. Well now it's getting cold, sometimes freezing, and they are still staying outside. Do I need to put the light on in the coop to intice them in like when they were younger? In the beginning we left the light on until we closed up. If we turned it off before then they didn't go to roost on their own. Of course that changed as they aged but I'm now wondering if we are dealing with the same issue again since they've slept outside for 1/2 their lives now. Thoughts?