#20 turned out to be a fibro-melanistic Birchen Marans. That is similar to an Ayam Cemani (al black skin, comb, feet, meat). Apparently FM can show up in a lot of different breeds. So he looks like a Birchen Marans with the silver hackle but with all black skin, feet, and comb. I am thinking of breeding him with a Cemani pullet to create a line of all-black meat birds. I named him Batman because he was tiny compared to the other Marans and he used to jump up on top of them to see what was going on.