Hi all, thanks in advance for your help. They are 17 (Amuaricana) and 18 (Marans) weeks old. The Amuaricana is bigger, bossier, and I think has pointer saddle feathers, although I'm not sure what to look for at that age. I heard some quiet crowing this morning, and my neighbors don't have chickens... So I'm pretty sure I have a roo on my hands. Anyone have any guesses based on the photos? The sizeof the chickens in the photo is a bit of an optical illusion because the Amuaricana (grey one) is closer to the camera, but it is slightly larger than the Marans (black one with copper head) in real life. More photos: http://imgur.com/a/Zdpwg Thank you!