I got 6 duck eggs to hatch a while ago, they all hatched great and are all 3 weeks old tomorrow. I was told the eggs were welsh harlaquin/Pekin cross. One egg was blueish, this one hatched out yellow and is now growing in darker feathers (this would be the harliquin colouring). The other 5 were white eggs, and they all came out dark with yellow chests and wing tips... can a cross of harliquin/pekin make colours like the black Swedish ducks? Or did the eggs get mixed up? photos are at various ages over the last 3 weeks.