I would apply Neosporin to the little belly scab to prevent infection from starting.
What kind of feed do you have for her? Supplementing with raw yolk can help them get some energy back.
You can place small stones in the bottom of her water to prevent her falling in and drowning, while still having access to the water between the stones. Always have water available for your birds (but I do understand why you didn't).
You could also create a chicken sling for her to practice standing and get her upright... Just place her food and water within reach. :) http://www.backyardchickens.com/t/713499/my-chicken-sling-pic The second post with the sock is a good option for young chicks strengthening their legs.
Vitamin B12 and Vitamin E in the water can help with foot/leg issues.
I hope that helps!!