Now understand they need the yolk this is what I call there survival kit. They can survive up to three days with it, we don't let them go that long but they actually could and since some of his yolk is still in the shell, he's got less time. So once that little head comes up, I would give him a couple of drops of vitamins, what kinda do you have? It's important that ducks get niacin which is vitamin b-12. I'm partially fond of vitamin b complete, I drop a pill in a quart of water.. But that's just me...
Niacin is B3 and thiamine B1 is also important. Polyvisol contains both.