I didn't realize that until after I responded, then had a light bulb moment lol
Let's see... I have white, buff, blue bibbed, black bibbed, butterscotch, chocolate, blue magpie, black magpie, silver magpie (I think?), and snowy.
I was excited to hatch a couple grey and a couple blue fawn this year. Then I have a couple non-standard colored ducklings that I hatched from mixed color parents. The most interesting may be a blue bibbed hen that has a partially buff (?) bib and one cheek

Though all of my ducklings have their juvenile feathers right now, so could change a bit I suppose.
As long as you have the ability to take of however many... Nope
@pipdzipdnreadytogo I'm in the same boat lol If we're counting all our birds, I have 104 or 105. Including: 61 or 62 Call Ducks, 20 Welsh Harlequin Ducks, 1 Blue Swedish Duck, 10 Pilgrim Geese, 6 Pomeranian Geese, 4 Sebastopol Geese, and 2 mystery mixed geese.