I have a white rooster who is a 3rd generation from my own lines bred only white to white. All others have came out VERY white but he has another color on him on his chest is a light buff coloring its VERY light and right where his back meets his tail the under coat there looks a smokey color. today or tomorrow I am going to pick up a black pullet who is 9 months old who is from a black on black pens. I am putting these two together and I will report back within a month or so to see what I get.