What about the 2 black Copper pullets?very good to know .
she look like is a mothers of the 2 pullwts .
so pen the 2 Blue pullets with Blaze .they share a same sire .so we are breeding to the sire .
pen Nimbus to his mother to breed a Dam line separatly .
you don t need many pen to do that just one pen for breeding and one to hold a rooster separately .
pen a Blue hen and her 2 daughter Blue pullets with Blaze first .hatch few Dz than remove the Blaze and the 2 pullets from breeding pen and replace them him Nimbun ,hatch few Dz and you done . 20 to 25 from each pairing and you will see how balanced they look . you end up with 2 lines .
chooks man
PS do not need to breed from 6 hens .make you confuse .keep it simple .