Since she can't see, i can imagine she is disoriented due to the change in bedding. I doubt it is a worm in her throat, as the symptoms appear when she gobbles down her feed. You don't have to put water down her throat when she does this as they should be able to clear it on their own. Putting...
Sounds like maybe she got disoriented and didn't know where her food was so was eating shavings, but when you showed her the real good stuff, she couldn't help but to eat too fast because she was hungry. I've had hens eat too fast and choke on food and honk for a few minutes to dislodge it after...