How is this done? I have a mottled Roo (black and white). If he breeds with a yellow/gold hen is there any chance to get a Mille Fleur type coloring out of the babies?
Zero chance
Mottled gene is recessive. To be mottled they need to get the gene from both parents.
Black from the rooster is also an issue. Black is going to show up on the chicks.
Can't breed a black bird to a buff and get buff. Black is too dominate.