The biggest issue that I have is some red bleed-through on the hackles and sometimes wing bows. I’m trying to add in a long tail and while those birds don’t have the best iridescence they are improving. There’s a unique comb type that not all birds have and maybe a bit harder to recognize in the roosters but I the hens it presents as a “shark fin” shape. I like the idea of a blade comb that can shed heat yet small teeth that won’t be as easily lost to frostbite. It might be the best of both worlds and it’s unique. I could definitely breed for it but might lose some of the best iridescent color so it’s definitely a secondary trait.they look great! Do they breed true to the black? any color on the roosters? What comb type are you selecting for?
I have some fibromelanistic-olive eggers that are all black and have a great green sheen to their pullet feathers. But not purple as yours. I've noticed some of my cockerels tail feathers are only partially iridescent.