There is a good thread to read by going to the top of this page and entering "slipped tendon--anyone try to fix this?" in the search box. There are many links in that thread to look at for leg bone deformities and slipped tendons. The chick in the thread is still thriving I think. Chances are slim to cure the problem, but many people give those chicks a chance to try to live a normal life as long as possible with extra care. Read as much as you can, and then proceed from there.