Hi! I got a big order of 15 chicks in various breeds 2 weeks ago. It’s been fun and challenging trying to figure out which one is which! I ordered 2 black copper marans, but I have 3 almost identical all black chicks. I’ve never had this breed before. What should I look for in them as they grow? I think the 3rd should be either an olive egger or Americana- based on what I think all the others are from my order. Or it’s possible they gave me 3 BCMs by mistake. Thanks!!