Leg wrapped with umbilical cord- leg injured
That's great of you to help the little one, and very promising that the color is good. Does the foot have reflexes? Does it pull the leg away or grip with it's toes?
Hopefully it will start to use it as it heals, but you might have to make a chick chair or sling to get it to start slowly using it.
You may be dealing with the effects of that or possibly some pressure on the nerve in the leg. If you're willing, I would massage the leg and put it through regular range of motion exercises. The young have a remarkable capacity for healing and as long as she is otherwise healthy you can give her a chance.
I think it will, once you determine how bad the damage is. If the band was just cut off today, I would wait until tomorrow to start massage, at least.