There are different schools of thought regarding breeding blues, but here is mine for what it\'s worth. First, good blacks should carry the sex-linked gold (s) gene to get the good green sheen. Blues should carry the opposite (S) silver gene (same allele) to avoid brassiness and get a nicer, lighter shade of blue. I believe in only breeding blue to blue once lacing has been established, and only those with the best lacing. It is very hard to tell what kind of lacing a black might carry since it is a \"self\" color. Those with more experience than I might be comfortable breeding in black, but I am not. Then too, I have heard old- timers say that one way to ruin good blacks is to start crossing them with blues. So that\'s my two cents, and others are free to disagree. In any discussion of color breeding I would be remiss in failing to mention that breed type and size and other characteristics should be higher on the priority list than color.