Thought I would give an update on my pullet. As of tonight...
* I've spent time trying to track down the state vet. I called to ask some questions about a necropsy (should it come to that) and the secretary at the state vet's office offered to have the state vet call me back, but so far he has not. (I still can't believe they charge over $200 for a necropsy when other states will do them for free.)
* I have also called quite a few vet offices in attempts to find any vets near us that were willing/able to treat a chicken, or even perform a gross necropsy. I think I may have found one, but could not believe how many vets I had to call to find one that "might be able to help".
* I have continued giving her B Complex vitamins 2x per day
* Based on input from @Eggcessive, I figured it could not hurt to start treating her, and everyone else, for cocci with Corid so everyone started on that earlier today
* She is still eating and drinking
* She's lost 0.6 ounces in the last 24 hours, but overall is only down 0.3 ounces since the first time I checked her weight 2 days ago
* She seems to be standing and walking more than she was yesterday
* She walked over to me when I called her, stepped out of her dog crate and stood next to me
* She is eating and drinking while standing instead doing it laying down
* She is putting up more of a fight when I try to get the B Complex into her
* She still seems to be a bit uncoordinated, but does seem better than she did last night
* Everyone else is still acting "normal"