Cayuga Pekin cross

[Ducknewbie2018]

is it ever possible for a Cayuga and a Pekin to produce all white ducklings?
I have a female Pekin and a female Cayuga. I do know the Pekin is laying eggs in the Cayugas nest and leaving.
Just trying to determine how many eggs are actually the Cayugas. So far we have had 3 black and white and 6 all white.

 

[Pyxis]

Well, theoretically, yes. The cayuga would have to be carrying recessive white, which could happen, but likely not, since that would be selected against when breeding them. More likely all the pure white ones are purebred pekins. The black bibbed, those would all pekin/cayuga crosses, if the breeds you listed are the only possible parents.

 

[Ducknewbie2018]

Thanks so much that’s we thought. We just wanted to make sure.