For the past week I have one hen that has started roosting in the nesting boxes. She will come out for feed and water and then go right back in. In the afternoon when we let them roam the yard I have to open the boxes and bring her out. When she is in there, she get very fluffy and her feathers are very ruffled. Don't understand it because she is one of the more freindly hens and now she has secluded herself. What's up with her.