I have a month old salmon favorolles pullet chick. She was growing and thriving quite well until two days ago. She is now lethargic, off her feed and water, has one eye closed and her beak does not close normally. When she does try to eat she goes through the motion but does not really ingest much food. Her beak is strange. The bottom is shaped differently than the other chick of same age and breed. It has a slight convex shape in the middle instead of concave. This makes it appear like she can't fully close her beak. One eye is fully open, bright, clean and normal. The other is just closed. It did have a bit of sleep type discharge, a very very small amount. I cleaned that up but the eye does not want to be open and remains mostly closed so I cannot really evaluate the eye itself. When she does show interest in eating it is pretty unenthusiastic. Her feathers are slower in coming in than her flock mates and she is smaller. They do not pick on her or isolate her. Does anyone have any ideas what is afflicting her and what I should do? They are all still in brooders in my house. I keep everything very clean and fresh food and water available at all times. I stopped providing electrolytes a couple days before this problem appeared. None of the other 19 chicks are showing any symptoms. Thank you.