Can she get up and stand at all, or if you stand her up, do her legs work at all? You may want to check into a chicken sling—cut a hole for each leg and one for her droppings to come through. They anre good if a chicken is lame or having trouble balancing. You can put one in a dog crate, and place food and water bowls right in front of them. Here is a link for pictures:
https://www.pinterest.com/kaseydixson/chicken-slings/
https://www.pinterest.com/kaseydixson/chicken-slings/