The original pair was probably around 18-22 months. The younger ones would have been 8-14 months. The original hen (Nanny) was colored that way. A few of the girls had less lacing. I honestly had no idea they weren't supposed to have it...lol Wow. Learn something new every day. Squeaky...
I just noticed that my girls had "lacing" on their feathers and yours did not. I wonder why. I got mine from a breeder, so I never really thought to check them to the Standard....