Is she able to stand on her "good leg" at all?
She may have suffered some nerve injury. You can try giving her supportive vitamin therapy. You can give 400IU Vitamin E and 1/4 tablet B-Complex once a day to help give her a boost.
Here's your other thread.
https://www.backyardchickens.com/threads/2-injured-hens.1523138/
If the vet didn't find any breaks, then I would give her time to heal. She likely sprained it, injured somehow getting away from the dog.
Injuries and trauma take time to get better. See that she's...