Slipped tendon (I think) please help nothing's working

I recently hatched new baby silkies and two have not been stepping in one of their feet. I've done some research and it looks like slipped tendon. I have tried the bandaid method but they still lift their one leg up and hop on the one. I also tried the thing with the straw and rubber band thing. I made chick chairs for now because I'm not sure what to do. Please help and I really don't want to cull it breaks my heart.