I have a RIR who suddenly and I mean suddenly has absolutely no feathers on her chest. I had thought she already molted back in sept-oct but I am new to owning chickens and am a bit unclear how long molting takes. I am waiting on an order of DE (food grade) and want to dust the coop and my birds. Tonight when I went to close the coop up she was in a nest box which is highly unusual for her. I figured since she lost her belly feathers she wouldnt be able to keep her toes warm on the roost so she opted for the nest box. Something still seemed off...she wasnt "all there". She was even having trouble holding her head up. I held her and she did move a bit but seemed to be in slow motion. Out of curiosity I attempted to put her on the roost to see what she would do and she wouldnt even grasp the rung and was very off balanced. Normally she is a very vocal bird who isnt too keen on getting handled. But will allow it when you can catch her. How do birds act when they get spooked or scared? Also my five chickens have been fighting from day 1 (back in september) for the first position on the roost and I've never intervened so that the pecking order could be established. Its never been bloody just alot of pushing and pecking... Any clue as to what is happening here??