@ashtree the science is in on wryneck. You need to keep up the thiamine B1. There are several vita packs that can be added routinely to the flocks water. I would recommend you keep some on hand. A drop of polyvisol directly into the beak twice a day will see your little guy back on his feet. I would also take a good look at the feed. It may well be lacking in essential vits and minerals.
http://www.thepoultrysite.com/publications/6/diseases-of-poultry/216/vitamin-bi-deficiency
http://www.merckmanuals.com/vet/pou..._poultry/vitamin_deficiencies_in_poultry.html
http://www.jefferspet.com/avian-super-pack/camid/LIV/cp/AB-P1/cn/36030/
Thank you for all the info and informative links.
