Are Babies in There? Candling Our Duck Eggs

A snake has disrupted this nest of duck eggs, so we've moved them all to our incubator. Do we have fertile eggs or not? Can we see signs of life? How far along in development are the ducklings? In this video, we're going to candle these eggs to get a better idea what we're dealing with.

More of the duckling story!
https://www.youtube.com/watch?v=jYiRjW6SdZA&t=42s

Our family:
Shawn and Janice
Samuel - 18
Sarah - 16
Andrew - 14
David - 12
Anna - 9
Abigail - 8
Rebekah - 2