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Wheaten is recessive to both black copper and cuckoo. If you breed him to the cuckoo you will get sex links - the roos will be barred, the hens will be black with some gold lacing. They will look sort of like Black Star laying hybrids. Breed him to the black copper and you get black copper that carry the wheaten genes. They will probably have too much gold or copper color on them. You can get something that is more or less wheaten by breeding the offspring of the wheaten x black copper back to the wheaten rooster. When you breed them back to their father, you will get some chicks with yellow chickdown, these will be the wheatens.