I have 3 hens and 1 rooster. They're just about 4 months old, so I anticipate that they are on the brink of laying. However, recently they won't go inside their roosting box or nesting boxes... they all huddle in a corner of the pen that I have for them. Is this abnormal? Something I should be worried about? They do not free-range. Also, one of my hens, a Brahma, has been making a cooing sound instead of the usual chirp that she has previously made. Is this normal?? Thanks for any help!!