One of my hens, seemingly out of nowhere, has developed very labored breathing. She is a quiet hen, but she wasn't really showing any symptoms before this afternoon, when she started breathing very heavily. I took her inside and gave her a bit of warm horehound tea (horehound is an expectorant - I hoped it may make her cough up any mucus stuck in her windpipe). Her breathing calmed down a LOT for a while, but right now it's heavier than it was before, possibly because she was outside again for a little while. I feel pretty helpless just sitting here, and I'm not sure if it's something that has to be treated RIGHT away. From what I've been researching, it could be several different things. I looked down her throat with a flashlight but there didn't seem to be any obstructions or gapeworms. However, I can't see too far down the throat without a special camera. All the vets are closed right now, and I'm still looking around to see if any of them treat individual chickens. Here's a video I took of her a few minutes ago: Any thoughts on how I could treat her? Has anyone else experienced this? Any input would be greatly appreciated!