Try some Vitamin E.I've got this one. I'm not sure if it's deformed, a vitamin deficiency or just got stuck in the egg too long, he did have some trouble getting out. He isn't any less active or spunky than the rest, just doesn't seem to be able to hold his head right there is poultry cell in their water.
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I have some liquid gels of E, cut the tip off with sharp scissors, and use a toothpick to get a couple of drops into the beak.
Try to do it 2 or 3 times a day. After 2 to 3 days, if it is fixable... it will be fixed.
Or at least that has been my experience.