These are hatchery quality blue marans, five and a half weeks old. I tried looking at hackle feathers and I don't see much of a difference. I'm pretty sure K here is a male. I'm guessing that these two are female. They're smaller, and they have no wattle growth yet. This one is G and here's I The next two I'm not so sure of. This one is my favorite, A. She seems to be smaller, like I and G, but she's got a little bit of wattle growth. This last one is H. She's a little bigger, more like K. Her wattles are just barely starting to grow, like A, and she's got a really long tail. Any ideas? I can get more/better pictures if you need them. Thanks.