Cayuga + Pekin = Rouen?

[StBob]

thanks for replying. They started quacking a week ago and on that basis I think the two brown ducks were definitely girls. The smaller of the two black ducks also had a loud quack.

 

[Mina83]

Ok, so I know this is a dead thread, but take a look at these!!! I only have Pekins & Cayuga, but these two I hatched & assumed were mixed(my Pekin boy is a bad boy), I've now noticed have a blue flash on their wings(right above the Cayuga's head in the last pic). My other mixed babies don't look like this? Any ideas?