this week, one of my girls keeps disappearing, but then reappears to eat every day and hang out for a while with the others. Today when she came back, we locked her in the coop and connecting small pen so that she couldn't free range and get back to her hiding place. She was so unhappy -- pacing and agitated. I don't think she is acting like the broody descriptions where a hen will stay on a nest and not leave it, so what's up with the hiding and staying out all night? We intend to keep her confined for a while. How long?? 2-3 days? longer? We are worried about night predators and don't want anything to happen to her. Advice PLEEZE!