None of our other hens have shown any sign of illness or fatigue and they are still laying just fine. Angel (the sick hen) has always been at the bottom of the pecking order and hasn't laid well since we got her a year ago. We got all three hens together from their second owners. Angel was a later addition (along with another hen that died early on) to a two chick flock. All the birds are the same age and were introduced as young pullets, but she's still always been on the bottom.
She still can't stand and she still can't control her neck at times. She doesn't seem excessively thirsty. I have been giving her eye-droppers full of water along with her vitamins. She swallows it, but doesn't act particularly eager to get more. I have seen her drink on her own when I put her back in her pen, even after giving her water with the dropper. She drinks cautiously, I presume because her neck may spasm at any moment. She hasn't eaten much that I've seen since Friday. I continue to offer her food when I check on her, but she never accepts. I offered her some grubs today and I took her out to garden with me. She was alert and upright (not standing), and she ate three of the grubs, but she didn't seem particularly interested and she left quite a few behind. When I put her back in her pen she is always upright and alert, but when I go to check on her, she usually has her head stuck underneath her body or leg. Its not a very happy position. From what I've observed she has neck and/or leg spasms that push her legs out from under her and/or her neck twists to the right and down. If she's being alert (as she usually is when I'm around), most of the time she is able to prevent her head from getting stuck down and she just flaps her wings and moves her head to get it back up. If I support her head on the right side she seems to have less trouble with it and she has no problem with me gently moving her head back up a little bit. I haven't noticed any improvement yet with the vitamins. Other than not eating, she hasn't deteriorated much either. I don't really know what to do. At this rate, starvation seems like it will be her way out with a lot of miserable time spent sitting on her head in the meantime.
Should I expect the vitamins to take a little longer to kick in or should they have done some small amount to improve her by this point? As I said before, I don't want to keep her alive in this condition if she's not going to improve since her quality of life is so low. However, I'm not eager to declare that she won't improve as I really don't know what's wrong with her. Thanks for checking in and I appreciate all the advice. We did clean the chicken coup with bleach this weekend, so hopefully that will spare the other chickens if it is contagious, although if it's very contagious then they've already been exposed plenty when they were pecking at her before she was removed.