you can give her a few drops of oil and massage it a bit. some times they eat grass clippings or something that blocks the way and have problems getting it down....it can kill a chicken....I hope she has emptied out by tomorrow. If not, some oil and massage it gently to see if it can be manipulated.
It may need to be flushed by a vet, or you could do it if you know how....
I was very unsuccessful in my recent run in with this.....