I have 5 Barred Rock chicks 3 weeks old, do they look like pullets or cockerels? They all look so similar so I believe if they're one or the other all of them are the same. I have heard that the pullets tails get bigger than the cockerels when they're this age. For 3 weeks these girls have long tails. I have been told by other chicken people that these are pullets I just want to make sure