Can you post a picture? It sounds like wry neck (torticolis, crook neck, encephalomalacia.) Wry neck is only a symptom of something affecting the brain, such as a vitamin E or thiamine deficiency, a head or neck injury, heredity, and in certain diseases such as Mareks, leukosis, or respiratory diseases. First thing to do is to give vitamins--E, thiamine or B1, and selenium which is found in egg, tuna, or nuts. Poultry vitamins in water, or by mouth, or Polyvisol No Iron can be used (2-3 drops daily.) Something like Poultry NutriDrench or Poultry Cell 1-2 ml daily would have all of those. If necessary hold the chicken wrapped in a towel, and ty to feed it watery chick feed and a little egg mixed in. Do this several times a day, and you can observe to see if it can eat and drink on it's own. Limit noise and excitement. Remove from others if getting picked on.