Help my chicken seems to have a blocked airway!

[bendchicks]

2 days ago, I noticed one of my chickens was struggling to breath. I have checked best I could for an obvious obstruction. Her crop is full and has been for two days. I have tried giving her mineral oil, while giving her water and antibiotics. She is still alive, but I don't know what to do next? Has anyone experienced with this? Thanks so much in advanced!

 

[ChickensRDinos]

It is probably either sour crop or impacted crop. Is her crop hard or soft like it is full of liquid - or both (liquid filled but with a hard mass). Hard crop is impacted. Soft with hard mass is an impacted crop that has gone sour. Just soft is a sour crop from a bacteria imbalance.