I'm stumped here....last night I went out to the coop to lock up the door & didn't see my flock of 2 month pullets in the coop & they weren't in the run either. I don't free range them yet, so the door to the run is always locked. During the day, I open up the coop door to allow more ventilation, it opens up into the run. After grabbing a flashlight, I shined all around the coop & made clucking noises & sure enough, all of the pullets were hiding & huddled between the hay bale & wall. It wasn't cold last night, about 65 degrees, with a very faint breeze. I checked the coop for any signs of what had them hiding & couldn't find anything that would suggest why they were. I checked the run & everything was tight & untampered with. I closed & locked the coop door and went back inside my house. This morning when I went to feed them, they were all out in their run & seemed fine, clucking for their morning feed. I have noticed that they are not using their roosting ladder in the coop & during the day they love to roost on the ladder in their run. I keep the hay bale inside the coop & spread it on the floor when I sweep out the coop. The coop is 6x6x6 and the run, which is attached to the coop is also the same dimensions, there are 5 pullets. So, my question is should I move the hay bale out of the coop or just leave it & let them figure out to use the roosting ladder on their own? I checked the area where they were hiding & they seem to have been sleeping there for several days, due to the poo buildup. Thank you!