I have a hatch of 10 Splash Marans chicks from shipped eggs. Can anyone tell me what things I should be looking for as I select which birds to keep/breed? I also have Black Copper Marans and I'm assuming I'm looking for all the same body shape and temperament things. But I'm not sure about the genetics of splash and how to breed them responsibly going forward. I'm especially interested in anything I need to know about light vs. dark splash coloring? Not clear in this photo, but some of them have quite dark spots, and others seem to have blue spots. Thanks!