I came home today and my youngest chicken was laying on her side in the pen up against the fence with her eyes closed. Her name is Winter and I have been her Dad since day one. She hatched about 22 weeks ago. She has been fine no signs of illness. She never goes in the pen while the other chickens are in there. I’m shocked to find her like this. I moved her into the coop separated from everyone and gave her fresh water. Her body is limp and she won’t open her eyes. She lays on her side and her one leg is curled under her and the other one shakes. She has been like this for a few hours. I text my wife and she said it sounds like she is stressed out. The other chickens pick on her that’s why she avoids them but I didn’t see any blood or missing feathers. What should I do if I can do anything???