I got a couple of ducklings a few weeks ago at TSC, and one of them was solid jet black. Now, at nearly a month old, s/he is feathering in brown. When s/he was tiny, I thought s/he might be a Cayuga because of the bright, shiny solid black color, but now with the brown coming in, I have no idea. In the group picture, its the one on the right, next to the fence.
I think you have a 'Dark Campbell' (which is basically a Khaki Campbell but dark chocolate in colour)....
Definitely not a pure Cayuga, here's what mine looked like at age 5 weeks: [VIDEO] Very pretty duckling, though! More pics! I hope @DancingWthDucks is right because the Dark Khaki Campbells look gorgeous.
