About a month ago I gained 4 new hens from a friend. We are in the process of building a new coop for them. For now, I'm keeping them in a cage at night, that is covered with sheets and light blankets. It hasn't gotten cold here yet. We haven't had a freeze. Nights are in the 50s. I had noticed that a few mornings one hen has been reluctant to come out with the others. She takes her time to come out, but when she does, she seems fine-- eats and walks around. She is 4, an Ameracauna. She hasn't laid any eggs since arriving. We have a rooster. She had never been around a rooster before. Last night I found her atop the cage, tightly wrapped up in a sheet. She had wrapped herself in it to roost for the night. Fearing predators, I unwrapped her and put her in the cage for the evening. She seemed fine today. This evening, when I went to prepare the chickens for bed, I found her once again, tightly wrapped up in a sheet. I unwrapped her and held her a while and then put her on the ground where she walked around and seemed fine. I came back with greens for the chickens and found her wrapped up in the sheet again! I unwrapped her and put the greens in front of her, and she ate them well. Then I put her in the cage. Have you ever heard of a hen cocooning herself into a sheet like this? Could she be chilled? Or does she just like fabric around her? Let's see-- yes, she was the one that was molting when I got the hens, but I thought she was done molting. I am a bit worried. I've had chickens for 5 years and have never seen anything like this, except for my little Sebright Bantam who used to love to crawl into rolled up rugs, blankets, and jacket sleeves to lay her wee eggs, but never to roost... All thoughts will be appreciated.