Shoes! haha the things we do to try to help itty bittys.
Look at these shoes here:
https://www.backyardchickens.com/threads/chick-with-curled-toes.51112/
Don't put it back with the mom if it's not walking.
It will just get trampled on by the others and end up dead.
The pic of the feet is kinda hard to tell whats going on...can you post a brighter pic?