Hmm maybe i should see if Pink is willing to part with some hatching eggs, The F1 i have were sired by Blue, and he has plenty of copper but still nothing in the girls. The dark blue color came from a pullet that I don't have any more so i have to be careful not to lose it. It is weird where the copper goes to? there must be something that is preventing it from being expressed, wish i knew what it was. As an aside, they are all laying nice dark eggs though.not going to hurt to try. I had a roo with copper on his chest and didn't get pullets with copper. my roos I got from pinkchicks flock the Luther blue roo he gave me lots of compared pullets. he had that halo effects in his hackles. not sure if that is what put the copper in them or not.