Questions about robins?

Okay so we found a robin not nesisarilly a baby just a tinsy bit older. It seemed to have fallen out of the nest, and couldn't get back and the mother couldn't do anything. It can fly pretty good for a short while, but it has a broken foot. We have fed it a little water from a dropper and some mushed up chicken feed for baby chickens. It really likes it and eats it good, and we have fed him a coulple worms. Whats the best way to nurse it back to health so that its foot will be okay.