I personally would probably cull at this point with no improvements unfortunately.
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Thank you.Sorry that she is much worse. It sounds like she has Mareks disease. I agree with OHLD on considering to put the chicken down since she is refusing food now. I would consider getting a necropsy by your state vet, to look for Mareks as a diagnosis. Refrigerate, but not freeze the body until you ship it. Here is a link for contact information:
http://www.metzerfarms.com/PoultryLabs.cfm
omg... do you have an avian vet? It maybe an impaction that something as simple as oil could fix (don't put the oil in yourself, could drown it) I have no idea, just saying it could be something that is an easy fix. My girl that was incapable of moving is supposed to be calcium deficient. The shots and oral meds have not done a whole lot of good though... I am not real sure if that is it. If your bird is in need of calcium, Tums in the water works until you can get some calcium from the vet and I hear Tractor supply sells the same thing the vet will give.Update #2:
She isn't eating anything at all. It seems like she's trying to drink water, but she doesn't seem like she's drinking much. Every time she drinks she shakes her head a few times. She's still fairly vocal, but still cannot move. It's been about 5 days like this.