What is wrong with my duck? Eggs not fertile?

[Furryposm]

I have a hen and 2 drakes, I've seen them breeding. Although only one Drake appears to be doing the deed. The other might be too young yet as he is only 7 months old. But my other 2 ducks are at 10 and 11 months.

She's laid over 30 eggs. I've tried incubating them and they've all been duds!! I have shipped eggs that are doing fine so it's not the Bators?

It's not been getting below freezing here for some time. Yet I cracked an egg from today open and I don't see a bullseye just a dot?

These are all ancona ducks from 2 different lines.

Any help would be appreciated.
Second picture in comments.

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[Furryposm]

 

[chickens really]

Do they breed in water or on the ground?.....Ducks have an easier time breeding in a kiddie pool or large rubber stock bowls of water...They might not be successfully doing the deed........

I breed mine in water.....

Best wishes....

Cheers!

 

[Jennn27]

Yep....mine breed in the water, too. I have two getting ready to hatch in a few days. We have a pond for them to swim in. Do you have a kiddie pool or body of water for them to swim in?

 

[Furryposm]

I have 2 kiddie pools in there for them? I've only seen them doing it in the pool. However when he chases the chickens, they are not in the pool. They are sure clumsy critters huh?

 

[Jennn27]

LOL Yeah, they are a bit clumsy. How old are they?

 

[Jennn27]

Oh...nevermind. Hahaha They are still a bit young to mate. I would give them a few more months and see if they do the deed.