Yes that is wry neck (torticolis,) but wry neck is a symptom. She looks severe, so try to get plenty of fluids and wet feed into her. Tube or crop feeding is also a way to do it if she won't take enough. Hopefully, it is not caused by Mareks disease, but theat can be one of the many causes. I'm sure that you will take care of her, and I hope she improves.