My chicken has been acting very strange over the past few weeks, she's the only one left (all her sisters died a month or so ago) and I can't get any more chickens. Everyday she sits in her nesting box and would stay there (she doesn't lay eggs any more) and so I get her out and put her down and she sits there and lifts her feathers and makes strange penguin noises!! then she gets up and shakes and walks around a bit then goes back to her nesting box her comb is also quite pale. I think she's depressed if that can be a thing for chickens and i'm not sure if it's fair anymore... I'd like some opinions on what to do? She still eats and drinks but only when she's out and free ranging.