I have never used one of the copper spotted breast males as a breeder. I just do not want to keep that many culls around as I like to fill my cages up with possibilitys. I would not cull for the Hackle and saddle feathers until 9- 12 months old. If you have the room and the young males are pretty good elsewhere I would hold onto what I could cage.They are very nice, it's hard to achieve the perfect Marans. All the blue copper males I have seen at shows had a fair amount more copper. Do I want a rooster with none to little copper on the breast. And, if care to answer , at what age would you consider the color to be true, mine are only 4 months old and they have a long way to go but I don't want to sit on one that just won't make it.