My hen is having an issue, please help

[Removx]

https://www.reddit.com/r/BackYardChickens/s/1aF11Z5XE6

Hi everyone! This is Szortyi, one of our chickens. I linked a short video of her. She has had a history of problems since we first got her. We bought her along with three other hens and a roo. Sadly they all passed away due to the dog getting to them. Szortyi was injured but recovered. During her recovering she refused to eat basically anything and barely moved at all. It was when we bought 5 new young hens that she got better. I thought it was because she had been lonely and not accepted by the flock, but now the new hens accepted her. She was completely revitalised, started eating and behaving like a normal chicken. She even started laying eventually. I'm not sure if she still does or not. She has had days where she doesn't eat much and has been worrying us. Here are her symptoms right now: she takes small breaths with her neck stretched out upwards sometimes. I checked videos of gapeworm but she doesn't open her beak as much as the gapeworm chickens did. She also closes her eyes while doing this. She has been doing this for a while. I thought it was because she has trouble handling the summer heat (we didn't notice her doing this before summer) but today is rather breezy and not very hot and she still does it a bit although probably less than on hot days. She also didn't run away when I reached out towards her and touched her. Usually she does, but sometimes she just doesn't. I checked her crop so she is eating at the very least. She lays a lot in one place with closed eyes, usually in the shade but today she was just next to the coop, probably due to a lack of sunlight today. She also makes this weird slurping sound constantly. I dont know how old she is. I'm really worried for her and I just want her to be able to live a normal chicken life. What is her issue? What can I do? Sadly vets in the area are not really available. Her condition seems to have worsened, she doesn't open her eyes even when I touch her and there's some sort of muckus coming from her beak. She has a snotty nose too. We gave her some medication for a cold and some vitamins. Someone suggested she could be old? She layed eggs just a few months ago. Any help is appreciated! Thank you in advance!

 

[User635240]

If she's having trouble breathing, from a pathogen, VetRX drops in her throat twice a day may help. It's available OTC at tractor supply and most feed stores.

 

[Eggcessive]

Gasping, mucus from the beak and nostrils could be a respiratory disease. There are about a dozen common ones, some common ones and some more rare. How does her crop feel—empty, full, firm, or puffy? Can you check it again first thing in the morning before she has any food or water, to see if it has emptied overnight? Does she have any sneeze, cough, swollen eyelids, or bubbles in either eye? Here is a good link about common respiratory diseases that affect poultry with symptoms:
https://edis.ifas.ufl.edu/publication/PS044