BS has always thrown me for a loop as well especially when you throw some green blood in there. I have mixed feelings over the split to BS dark spots on the shoulders. I had a 15+ yr old rooster start to change his colors late in his life and that pattern showed up but he had never produced a BS chick with our free range BS hens. He is long since dead as my neighbor down the road shot him for tearing his sliding glass door apart. I am still confused about the BS split pattern and cannot be of solid help.
Gerald Barker