I recently rescued some ex-battery hens and have had them for about 4-5 months. One of them has recently gone off her food and is usually the first one out the coop to get her feed. She occasionally eats a little bit but nowhere near as much as usual. She also is very reluctant on coming out of the coop. She's not the fondest of being picked up but she's usually ok with it, now she's making clucking noises that sound's like she's pain. Is also usually really friendly and curious and now just hangs out under a tree which I can't get her out from. Im unsure on what is wrong but there is nothing tormenting them at night and nothing that could be stressing her out.