Wow, never seen anything like that. Do you have any prednisone? I wonder if that would help? If she were mine I would tube fluids, then baby bird food.
There was only one thread that seems similar to my situation.... https://www.backyardchickens.com/t/763473/horrible-swollen-thing-coming-out-of-my-hens-mouth
The bird did not survive in that case.
Unfortunately no prednisone. Couldnt come up with any on jeffers or TS site. Any recommendations on where I can get it ?
Note: Thanks for the reference on tube feeding.
Prednisone is one of those drugs that's almost impossible to get without a prescription, so I wouldn't bother... Tube feeding will keep her from dying of dehydration and starvation, so that's why I suggested it.