Sure sounds like it @PearlTheDuck so sorry.

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Sure sounds like it @PearlTheDuck so sorry.![]()
These 30 eggs were under a duck? could have been she had too many trying to keep warm so some got cooled off too much then she'd rotate which would mean others would get cooled off extreme differences in temps. next time she goes broody start marking the eggs use 1 to what ever or date something like that so when she starts brooding you can take out all the oldest eggs and leave her with 8-10 that she can cover good. Other things could have played a part in them dying but having that many eggs I'd say was the cincher.
Who is your drake and which female is this?
Oh okay well that helps explain I was thinking she had a whopping 30 eggs she was sitting on. And some of the eggs were fertile and close to hatching?