Collecting duck eggs

[Kimlaxmom]

today is day 6 of collecting eggs for hopeful incubation. I have candled day 1 and all I see is air sac at top. Im afraid all 6 are not fertilized. What do I do? Any suggestions?

Thank you

 

[The Moonshiner]

Put them in incubator and candle in a week.
You can't tell if an egg is fertile by candling until they've had time to develop some.

 

[PotatoWaffles]

If you're willing, you can crack open a few of the eggs to check for fertility.