Love this thread it's a wealth of knowledge!!
I have a question though. I'm just starting day 3 for my 3 duck eggs and I tried candling them because I am extremely impatient haha. So when I was candling I noticed 2 of the yolks don't move around when I turn the egg, but the third one moves to wherever I turn the egg. Is this bad?
NO! It's GOOD! What you're seeing are the early stages of embryonic development! Sounds like you've got two growers and one infertile...but don't throw that third one out yet...wait til day 10 at least. Candling is much easier with duck eggs because the shell is a bit thinner and more transparent. Don't worry about taking a peek on day 3..it won't hurt anything...just be gentle when turning the egg while you're candling, making sure not to be too jarring. Good luck!