You need to assist it foot. You take some painters tape and make it a boot. Put down a little tape, spread the toes out on the tape then cover with additional tape. This will get the chick used to having its toes spread like normal. (It should have done it immediately).
Give it three days and remove the tape, if it isn't cured you can tape it again. This is the only method I have found to work, but I've only had a 50% success rate with it.
Vantic