I have a cross breed cockerel that I hatched, his father was a light Sussex sadly no longer with us, mother commercial brown hen and he is a stunner, not really white but ivory with light brown small specks and have just noticed thismorning he has some of the green tail plumage that the Sussex cockerels have. We have called him Sydney, I do find that if the mother is one of my commercial brown hens then the light Sussex white seems to be more dominate however, if the mother is one of my speckledy hens then the chick comes out dark with yellow plumage around the neck and tummy, but the cockerels always have the lovely green plumage in the tail.