With my Black Coppers, Kongs overcoloring in his chest has helped add hackle copper to his daughters of overmelanized hens. How this overcoloring will effect your Blue girl I can't say, without test mating when the time comes to find out.
Another new one today. Pretty neat looking.
2 of the 3 Olive Eggers with a Marans egg. I'm guessing the lighter one is an F1 and this new one is a backcross. I separated the green eggs at lockdown but didn't separate the Easter and Olive.