Another breeding question on ducks

[shelleyd2008]

I know with chickens the hens can stay fertilized for like 16 days? I think

Does this work the same for ducks? I have 3 different breeds, all pure bred, and would like to seperate them in the spring. Just wondering how long I should wait before selling pure eggs?

 

[purelypoultry]

I reccomend at least 3 weeks on ducks.

 

[shelleyd2008]

Ok thank you!