So what did you do?
You can see the tendon on the back of the hock joint. When you straighten the leg you can roll it back into place and wrap it while it's in place. My chick's leg was very swollen because it was from an injury from a hen so maybe that was why it wasn't successful, I wouldn't give up on your little one just yet!
Mine grew up to be a beautiful rooster named Peg Leg Pete because he had one functional leg.