Hi,
I know this is too late for you, but may interest anyone else with a similar problem.
One of my chicks hatched 3 days ago and its feet were clenched and turned inwards and it was just shuffling along and couldn't stand or weightbear.
Every day, for about 30 mins at a time, about 6 times a day, I would hold and support it so it was standing on its feet the correct way to get it used to this position.
Then turn it on its back so it would 'excersise' its leg muscles in trying to right itself.
It would kick OK in this position stretching its legs and feet out.
Gradually, it would stand in the correct position for a little longer each time before flopping down in a heap again.
I rigged up a ramp and it would actually take steps, still with me holding it going downhill.
I kept perservering until it finally managed to stand up without me holding it up and this evening it actually walked a few wobbly steps.
I think the standing exercises halped strengthen his muscles until his brain took over to using the much practiced standing position enough for it to actually walk.
I now believe in miracles, because eveyone who saw him, said he would never walk.