OK not to freak anybody out, and I sure don't know my stuff, but could that be gape-worm? Does that have those symptoms? It would sound like her breathing is raspy but it wouldn't actually be her lungs, because the obstruction is higher than that, and there's the head-shaking, which I'm pretty sure is a symptom. Plus why would a chicken would shake her head for her lungs? Paranoid newbie here of course. Smack me down and set me straight please. I think you can see them if you look down her throat.