I had the same problem with the neck having some sort of muscle spasms. Someone on this sight told me to give vitamin E, take a whole capsule and put it on bread or in oatmeal, anything to get some into your chicken, this completely cured my bird. Please try to find some of my other posts on this subject. My girl layed for three days without food or water before I got this information and she is still doing great, even lays eggs now. Nowever, I kept her away from the others and in the house for three weeks over Christmas last year, Good Luck I will keep watching your post to see how things go.