well, the buff roo I have is to put type over my reds... then the long haul back to red again. but the only difference genetically is dilute, so that should be easy to eliminate since it's dominant.
first gen will be buff, second gen will start throwing reds again, about 25%. or put over a red about 50%. I really like the buffs but have too many projects going on to get a good buff line going too LOL