For three nights, this chicken twists and hangs its head at night. Cannot eat or drink. In the morning, I take her out to the backyard and hold her, she straightens out and runs away from me. Out of 100 chickens, so far, this is the only one doing this. I am a beginner chicken care-taker. I just hatched some babies the last four months and did not vaccinate for anything. Was that a mistake? The first 60 chickens, I bought from a hatchery a little over a year ago and was vaccinated for Merck. Some of my girls wanted to be moms so bad that I gave in. It got out of hand when I went on vacation and no one could tell which were babies and which were new eggs. That is why I have so many babies. I am in the process of expanding my coop. The bedding is Klean Coop. I did throw in some hay about three days ago, I don't know where my son got the hay from. But, this chicken has been in a fenced area away from the rest of the flock and away from the coop. They eat the regular chick feed and I also have feather fixer feed. I have stopped giving treats the last three days.