Recently, my flock of nine 33 month old hens began their molting which they have done before. My littlest leghorn, who I effectionantly call "Runty", has lost a lot of feathers, which is normal. However, when I go down to feed my flock in the evenings, Runty stays outside while all of her sisters have gone in their coop to sleep. She perches on a log placed on a support beam about three feet off the ground in the run and closes her eyes to sleep. When I see this, I move her inside the coop and put her in a nest box with her sisters. This has continued for a week or so.I have never seen this before and I am growing kind of worried. What should I do?