I have not paid much attention to the chickens since Wed when I locked them up for the holiday. I wish I had. When I went out to feed and water this morning this is what I found.
Oreo was huddled up behind a box in the chicken house. She is my biggest most robust egg layer and lays huge eggs.
I gave her a shot of antibiotics and we have her in the house. No other symptoms other than her comb is light colored now.