Does anyone know the genetic code for black tailed buff marans? I thought it was wheaten but with CoCo, but then Bev Davis' website says it doesn't have the columbia gene, but does have the MhMh red gene. Also she said she got hers out of a wheaten to wheaten cross, so how could the parents carry the columbia gene (if btb marans actually carry it) without showing it? The chicken calculator says btb os wheaten with the columbia gene, is marans btb different?