It sounds like she may have been injured. Wry neck is a symptom of injury, vitamin deficiency, and is sometimes seen in a few diseases such as Mareks and others. Along with vitamin E, give some B complex vitamins since thiamine or B1 is also needed. Give a few bites of cooked scrambled egg which contains selenium. Something like Poultry NutriDrench or Poultry Cell tonic would have all of those. If she is able to eat and drink normally, I would keep her with other chicks her age. Were there any older chickens with her when she was injured or showed symptoms?