That's why I guessed dystonia. One foot is closing involuntarily, balance issues when swallowing and walking. View attachment 1245671 The second photo is you seeinView attachment 1245674 g his feet in the air, sitting on his hiney while also seeing the bottom of his throat (tan) because his head went completely upside down and picked up his feet. He's stuck in this position until I flip his head back over and down. His crop has been emptying everyday until today. No lice. Layena + Grit + oyster shell as he's been in with his hens. He is of the newest chickens, from day old and he's 15 months. Had Marek's vaccination at 1 day old. Didn't eat but one bite today because his crop didn't empty last night. Sorry about the photo quality, maybe his sight won't be so sensitive tomorrow. I have a video of the head swerve but it won't post here.
Poor fella - he appears to be suffering from Wry Neck (crookneck, torticollis) which is a neurological symptom of certain diseases like Marek's, sometimes it's from vitamin/nutritional deficiency and head injury/trauma.
Is he beginning to molt? Sometimes stress from molting can bring about underlying illness and conditions. I understand he was vaccinated for Marek's, but the vaccine only prevents the formation of tumors, chickens can still succumb to infection by the virus.
http://www.backyardchickens.com/a/the-great-big-giant-mareks-disease-faq
He is very pale, this is concerning. You can try vitamin therapy of Vitamin E 400IU daily, along with 1/2tablet of human B-Complex vitamins(no iron). Offer some chopped egg or tuna for Selenium.
Most likely he would benefit from eating a higher protein feed with less calcium - so a small bag of chick starter would be good.
Try to keep him hydrated, he most likely needs help with drinking eating- see video below.
