Respiratory problem that I can’t deduce-

[Wyorp Rock]

Pic of the medicine! Her trachea is about near the base of her neck. Her throat is normal but the split off point for the esophagus to the crop and the trachea to the lungs is near the bottom, not at the back of the mouth it’s very strange

That is Fenbendazole, but the product itself is lacking...

If you want to deworm her, go to TSC or similar, get a bottle of Safeguard Liquid Goat Dewormer and dose her at a rate of 0.23ml per pound of weight orally, once daily for 5 days in a row.

Those Poultry dewormer tablets, you'd need to give her several of those. It's all outlined in this long thread here::
https://www.backyardchickens.com/threads/are-these-normal-poops.1553393/post-26276852