This is our first time raising chickens and we bought them from a reputable organic breeder that "sexed" them for us by checking vents and wings. We got them at 1-2 days old, now they are almost 3 weeks old. We were told they are all females but 2 of the Reds are worrying us some bc their combs are a little more prominent. But their body sizes are all the same. We have 3 reds and 3 buffs. I'm not to worried about the buffs, for now at least lol Let me know what yall think! Notice their body sizes are the same and even tail feathers. 2 of the Reds have had a black dot or line on their heads since birth, only one doesn't.