One of my chickens lost most of its neck feathers (video attached). She is also making weird screeching sounds most of the day by extending her neck up in the air and letting out air. It almost looks like she is trying to crow. It sounds like a car brake. Until a few days ago she has been mostly okay and even laying eggs. But she has been acting very poorly recently. Eyes closed most of the time and just staying in a corner. Her poop seems normal. I would greatly appreciate any help in identifying what could be the issue. We don't have vets in the area that know much about chickens ...