Out of ten 14-week-old youngsters there is one that seems to be having trouble seeing. I didn't pay much attention to the first instance. I have an automatic door which I can see from my pantry window. One early morning I noticed that all the chickens had left the chicken house except one. She was on the top perch walking back and forth trying to find the next lower perch. Back and forth she paced. Finally she flew off the roost and hit the window that has hardware cloth. (I put strips of short pieces of silver tape on the wire so hopefully the chickens would know it was not an open window). Not thinking anymore about it, last night I looked out my pantry window to make sure the door had closed (will never totally trust it), and there was the same chicken pacing around the chicken yard looking for the opening to the chicken house. The other chickens were already safely inside on the roost and she was all alone outside pacing and searching. It was almost time for the automatic door to close. I went outside and picked her up. I know she couldn't see because she allowed me to pick her up. I took her inside the chicken house and placed her on the roost. I know that chickens cannot see in the dark but these two incidences have been low-light--not dark. And it was not dark enough to affect the other chickens. Is this one chicken going to be eventually blind. Is there anything I can feed her or do to improve her low-light vision? or anything to prevent it from getting worse?