Could be an infection or vitamin deficiency. Usually brewers yeast (vitamin b's and thiamine) is recommended if vitamin related. An infection is going to require antibiotics. I'd get to a vet toot sweet
None that I know of. I have added vitamins to the water. We have no chicken vet, but I am going to call the local college. They have a poultry department and maybe I can bring her in there.
They free range about 1/2 acre all day.
I have 9 other birds and everyone is fine. They are all a laying except my grandma hen, Oreo.
Good news! My chicken roasted tonight for the first time in weeks. Her comb is looking better and she didn't do that shaking thing with her head.
The Vitamins I added to the water must have worked.
Thanks for the help!