lakota_elder
About the duck of unidentified sex, the bill colors on mine were pretty dark on both sexes at that age, I want to guess female because the feathering is so light. On my silver drake's the body feathers kept getting darker and more colorful while the female got lighter and more white. But the drake next to the unidentified one in the photo also looks petty light so I don't know what to say for sure.
I think that young drake looks fairly typical at that stage, maybe a lighter shade of green on the bill than usual. What color are the dark feathers on his wings, more bronze or more blue?
Where did you get your ducks from? I love the way the lighter coloring looks.