You can tape her toes by making a shoe if she is walking around. It sounds like nerve involvement, which could be from injury and any of the possibilities that @oldhenlovesdogs mentioned. I hope that it is not Mareks, but you could get a diagnosis with a blood sample sent to this lab in Texas who can test for Mareks for about $20:
http://www.vetdna.com/application/forms/aviansubmittalform.pdf
Most people get testing done after death with a necropsy performed by your state vet.
You might check into chicken slings and chairs if she cannot get around to food and water. Here is a link for that:
https://www.backyardchickens.com/threads/versions-of-chick-chairs-please.1166308/
http://www.vetdna.com/application/forms/aviansubmittalform.pdf
Most people get testing done after death with a necropsy performed by your state vet.
You might check into chicken slings and chairs if she cannot get around to food and water. Here is a link for that:
https://www.backyardchickens.com/threads/versions-of-chick-chairs-please.1166308/