I just had my first black naked neck hatch last night and I had to help another this morning and that little chick is in a cup in the incubator now cause he wasnt fully absorbed as far a yolk, I hope it lives, it was really badly broken from the cat dumping over my incubator on day 17...so these are little salvage chicks but so far all but 2 have hatched out of the 15 I saved.
Good job on saving them, hope your little early bird makes it, the earliest I've had success w/ has only been about 12 ish hours early. And that was w/ intensive care for over a week and added care for another week.