Slipped tendon?

[Chickad00]

I hatched out chicks out of an incubator a few days ago and the last to hatch seems to have a slipped tendon I think. I only just noticed it because it had been walking fine before. It keeps the leg up under it and is hopping on one foot and the bad leg seems swollen but I can’t see any red. It’s still at an age where it doesn’t want to eat or drink yet. I massaged it somewhat and stretched out the leg and it seems to be a little better. Any advice?

 

[Wyorp Rock]

You may find this information helpful if you didn't get answers on your other 2 threads.
http://www.poultrypedia.com/poultry-podiatry

https://www.backyardchickens.com/threads/3-day-old-chick-with-splayed-leg.1531042/
https://www.backyardchickens.com/threads/possible-splayed-leg.1531079/