HI, my hen (Luna) is usually one of the friendliest chickens and always ran up to meet me and always made her distinctive sound\screech. Lately all she has been doing is coming out in the morning and going over to the same corner of her run. She sits down and dozes all day. She doesn't make noises, get up (even for watermelon), and I haven't seen her lay an egg. This has been going on for a few days and all the other chickens are fine. She is eating and drinking although only at night. She also goes in by herself. Possibly important: she is near the top of the pecking order and the other chickens don't pick on her.