No, no predictability. You'd likely get pullets that look much like the pullet I posted. The Rooster will look similar, but we got leakage in the wings. The cross with an Gold hen, such as the Orpington would be messy, I should think. Remember also you going from yellow legs in the Black Star, as both parents had yellow legs. The Australorp and Orpington have white/grey legs. Things get muddled.
The Black Australorp seems to "cover" most everything in black. I'm no genetic expert, but the Black Star is already a mutt. Going out much further will produce even more "muttiness", to coin a word.
The Black Australorp seems to "cover" most everything in black. I'm no genetic expert, but the Black Star is already a mutt. Going out much further will produce even more "muttiness", to coin a word.