Last night I got home and went to lock the chickens up and my one hen who sleeps by herself in the pool shed was in the coop and the rest were outside. Some were in the little half moon protected part of the basement window and some were roosting on the metal which is freezing. It got to about 6 degrees. I spent almost 20 minutes trying to round them up and get them in the coop. Once there they were fine. Tonight they all slept outside the coop by the basement window thing. The coop is really small and they all cram into the nest boxes. But they free range so they ONLY use it to sleep in. During storms they stay in my pool shed which is open to them right now too and they often hang out in there or under the deck during the day. So they have options...but they are CHOOSING to sleep outside. Its too dark for me to move them without turning on the flood lights and once thats on they run away and bite if I try to move them to the coop. Are they too dumb to know whether its too cold for them? Or do they know they'll be ok. Why are they doing this? What should I do?!!