Probably nothing. I've been through this so many times, enough to know there is no hope. I can do penicillin just because I have it here, just in case there is a minute chance for her. I'm not sure how long she's been like this because she's not one to like to be picked up at all. And I can't reliably tell her eggs from some of the other Rocks' so I don't know how long she has been halted in her laying.
In retrospect, had I known what I know now I would not have taken any drastic measures to save Peanut either, other than to give her Baytril just in case. It saddens me when I think back on everything I did to save her in those 2 days before she died probably just made her even more uncomfortable. If I ever have another chicken who displays the same symptoms, I will make her as comfortable as possible and let her know I love her and let nature take its course. Since you are my chicken guru

Totally off topic... I know that you have never used a crow collar since you live on acreage but have you (or anyone reading this thread) ever heard any of experiences good or bad about using one? Our little guy has been crowing at 5:15 for the past few mornings and I know that sooner or later Cranky Pants next door will goosestep over here and make her annoyances known. We live in a big neighborhood with lots of people that work shift work so I really do want to be a considerate neighbor but I don't want to rehome our little guy because he is such a little chocolate love button. However, if a crow collar would hurt him in some way, I would rather rehome him. I need to so some research on the whole crow collar topic.