I have one didn't make it she was fully developed and had internally peep. But she sided over night. Her belly was internally black what could that mean
I'm so sorry you lost one. One of our ducklings didn't make it either. It must have passed just before internal pip. We have 2 that don't seem to have the strength to hatch after external pip, but I'm still hoping and trying to help them very slowly.
9 ducklings hatched and one chick so far! The chicks are under a broody in the coop, but one got stepped on and most of the shell broke away from the membrane. I brought that one into the house, wrapped her in a wet paper towel with the air cell end sticking out, and put her in the incubator in a cup so the ducklings wouldn't trample her. A few hours later I got to see a chick hatch for the first time! I put her back under the broody right away hoping she'll encourage the others to hatch.
Molly, all your "babies" are awesome!
Here is my youngest duck whisperer.