We had good luck this year getting a LOT more copper on the cockerels by using our splash copper on BCM hens. Blue (and lacing) improved, and really liking the amount of copper on the little guys so far (with clear blue breasts, no leakage).I use blacks blues and splash in my blue breeding program, I love the artistry of getting the blue just right from generation to generation by crossing splash in when the blue gets too dark or black when the blue is too light. Blue genetics will always be my favorite