I hatched a "runt" chick recently that also had a twisted leg/foot, and it didn't seem to be growing like it's hatchmates. Unfortunately, it died when it was about 5 days old. By that time, it was probably only about half the size of the other chicks that had hatched at the same time. I had even switched its feed to a powdered parrot formula, and had seen it eating and drinking; but it gradually got weaker and acted tired a lot. I hope your chick starts growing and grows more active than mine did.