Thought I'd share a video of my day 10 duck eggs that I just candled. Got rid of the three that had shown no development at all. Sorry for the background chatter; we thought the first one was a double-yoker because of the two dark spots and then figured out it was the head and the legs
https://www.dropbox.com/s/n6dgexjv6gmst4a/Day 10.mov?dl=0

https://www.dropbox.com/s/n6dgexjv6gmst4a/Day 10.mov?dl=0