At what age? I picked up what they said was a black that is 5 weeks old and there is a little white on the wings and under chest? my hope is that it is Mottled, just wondering when that appears?
The mottled color on the black feathers begins to appear as they lose their baby feathers. It is not unusual for an all black chick to have some white on the first set of wings feather that grow in after the chick down. They will normally lose that with that first molt of baby feathers.