Thank you so much for all the information!!
I have been feeding her the raw eggs because she just won't eat anything else. I figured the yolk would at least have something in it to keep her going. I also know that the Epsom salt works as a laxative. I was considering another dose, however, because while I was researching the dosage, I came across someone that used it to treat a magnesium deficiency in a hen that had somewhat similar symptoms to Blizzy's.
I will be sure to try ACV with her and the rest of the flock as well--I was not aware that it would help in this case! Their waterers are rubber/plastic buckets. I'm assuming that's okay. Does it matter if the ACV is the store-bought kind, not the kind with the 'mother' in it? I don't have any with the 'mother' on hand right now, but I do have the other kind.
I am not tube feeding, sorry if I confused you with the wording in my posts. I have been administering 5-10 ml of vitamin/electrolyte water about every hour by just dropping it on her beak and letting her suck it up from there. I didn't know how much water she would need, so I was just giving her what she would take before dozing off (which she tends to do at about 6-7 mL). I will try to start giving her some water in the night, too, if that's what it takes to get her through this.
I have been washing my hands after every time I come into contact with her, no matter how brief. While I don't think at this point that it's contagious, I will not be taking that risk with my flock.
Thank you again for your post--I at least know some more things I can do to keep her going!
As for how she's doing this morning, I was surprised to find her pretty perky and looking around when I uncovered her crate. (I think she has been having bad mornings due to the fact that yesterday, her head had been hanging most of the night, and the day before that, her head had been stuck in the bars of the crate most of the night. Today, she was not able to let her head hang, and so it appears she is doing better than she has in mornings past.)
She is trying to use her legs again! The dog crate is small, but it wasn't quite small enough for her to reach the floor in her sling, so I will be trying to give her something to stand on today and see if she can get some strength back in her legs (hopefully without pushing herself out of her sling).
She ate more of her egg this morning than she did yesterday. I managed to get about 15 mL of her vitamin/electrolyte water in her before she dozed off, too. I will give her more when I next sit down with her.
Sometimes, in our efforts to help, we do so much that it tends to hinder improvement ... if she's tryin' to use her legs, I'd take her out of the sling. And, if she's incapable of walking? She ain't able to fly -- may not be much need for the crate, but you could place screen or hardware cloth of even fabric stretched across the inside of the bars, to prevent any further mishaps. Sounds mean, but I sorta push sick birds and animals around a bit, to force 'em to counter the imbalance, which makes 'em use their muscles a bit more ... sometimes, that's what encourages 'em to fight back a bit more.
As for the ACV? I'm not sayin' the 'mother' isn't beneficial, but it's the tannin that's in all 5% solutions of apple cider vinegar that you're after here -- the one that you have on hand, or the cheapest one you can find, is all you need ... you could scramble the eggs a bit, and stir your electrolytes into it. Add a bit of wheat germ if you've got it, and a bit of yogurt wouldn't hurt .. stir in some chick starter -- whatever you can get her to eat more of ~'-)