My hen has been acting very strange, something is definitely wrong with her. She's a red-sex-link and a little over 4 years old. Yesterday, I noticed her laying down in the coop away from the others. I picked her up and tried setting her on a low fence, and she could barely stay on it and was wobbly. I put her into the inside of the coop, she seemed to act more normal. There was a thunderstorm during this, so I thought maybe she just got scared. But when I tried bringing her out of the coop she just lay there and seemed pretty lethargic. I took her inside my garage and set her up in a dog kennel and gave her two cups of water, one with ACV, the other with Sav-A-Chick electrolytes. So far, I haven't seen her drink by herself, I've had to dip her beak, and even then, I'm not sure if she's actually drinking it. She seemed to get better for a bit, but today she's acting worse. She can't walk without falling and looks like she's gasping for breath. This morning, I thought it could've been wryneck, because she kept tilting her neck to one side. I gave her asparagus in case of a thiamine deficiency, but she wouldn't eat it. Now, it looks more like Newcastle or possibly Mareks. I'm thinking that it's not Marek's because of her age and because her legs are still positioned normal underneath her. She hasn't laid any eggs since I moved her. I know Mareks isn't really treatable/recoverable, but I read that a certain strain of Newcastle has a higher chance of recovery. Here's a video, any advice/help would be appreciated.