Question--how do I test a rooster to know if he is a FBCM? I have a group of 4 black coppers growing up with a motley crew and I'm not sure if some are FBCM or sons of my black sexlink roosters. Is there a clue on the wings???
Hi Arielle! How old are they? Also if you have photos of them we should be able to help you figure them out.
