Not sure. They have to get the cuckoo gene from somewhere, which is not a color gene but a pattern gene making the white bars on the feather. You can find lavender cuckoo and lemon cuckoo too. Blue cuckoo I think. They probably bred in some barred rocks way back when to introduce the gene and then bred back to the Orpington standard. Papa's Poultry has nice cuckoo Orps. At least my Buster Posey hen is nice. Very broody though.No, I don't think I want to breed them. I do like my BBS they are pretty. I have 4 gold laced orps. One jubilee. Orp. My splash is beautiful. How do they make the cuckoo orps?