Hi, I am fairly new at raising chickens. I have a young hen (Speckled Sussex; approximately 22 weeks) who has become lethargic and appears to be blind. She is able to get around (gets on her nesting box, walks around a bit and can get up on the roosting pole) so I'm really not sure if she is blind. She closes her eyes a lot and from what I can see her eyes appear normal. She sits/stands for long periods of time with her tail down...and is usually "asleep". I've separated her from the rest of the flock and gave her apple cider vinegar and electrolytes. When I first gave her food, she ate all of it, but today it appears she has not eaten much. Any thoughts/suggestions?