Hi ,,, I was told when i bought my six chicks ,, that they were all girls... I have a feeling , as they are growing,, that one of them is a boy. How can i know for sure ,, We have 2 Plymoth barred Rocks 2 black Sexlinks, and 2 New hampshire Reds,, All of the others look exactly like each other like little twins,, with little distinguishing marks to tell them apart,, but the 2 New hampshire reds are very different. one is much bigger than the other , His/or / her comb is much more developed,, and He has more, and more black tail feathers tail feathers.. Do you think they are just developing at different rates,, or can this be a sign of different sex ?? I am pretty sure my town has an ordinance against owning roosters,,, so i sure hope "Penny " is a Girl !!