Fertile Duck Eggs?

[Miss Lydia]

Just put of pics of fertile an not and let the OP decide by pics

 

[cheezenkwackers]

Ok, here is my picture. The yolk in front is fertile, the one in the back is not. To me it seems like it is more about the size of the white dot than the bullseye. Having said that, the OP picture sure looks fertile to me. I would be interested to hear a video of the non-laying duck’s quack.