Baby chick was struggling to hatch, and I finally intervened after 12 hours of no progress. The chick zipped the egg, but the hole was too small for the chick to emerge. Once hatched I noticed a yellow fluid filled blister about the size of a dime on the side of it's neck. The chick is exhausted, but breathing fine and trying to stand. I believe the blister was caused by repeated pushing and rubbing trying to emerge. All the other chicks are healthy. Do I just leave it and hopefully it'll resolve itself? Thanks.