I have 2 ducklings that hatched about 1.5 hours ago. The first one still has it's umbilical cord and what appears to be the yolk sac still attached. They are both still in the incubator and I have more pipping. Any ideas?? Right now I'm taking the "leave it alone" stance but will intervene if necessary. It doesn't seem to be bothered by it at all. The two that have hatched are snuggling up together (presumably to stay warm, although incubator is at 99.8 with humidity at 70% ... too humid??). It does appear to be getting a little smaller in the middle so maybe it's working it's way off??