We bought 2 chickens at the end of May (apparently 20 wks old). One laid for the first 2 weeks, then when the weather became really hot she stopped laying and began the moult (I think, lots and lots of feathers found each day). It's now October and she hasn't started laying again, she eats and drinks but is often huddled in a corner with her head down. The other chickens are really lively and she is often left watching. We have put worming liquid in her water, keep well pellets in with her layers pellets and put mite powder in her coop plus on her. Do you think she is old or ill? or just depressed? please help