I've got a brooder full of chicks from 1 month to 2 weeks old. I am trying to determine who's a roo and who's a pullet. One of the oldest chick is definitely a roo... red comb and little red wattles. The second oldest chick is more feathered and has no red on her comb and no visible wattles. I assume she's a hen. All of the chicks look like her... no red combs or visible wattles but they are "rooster fighting" with the known rooster. Will little pullets do this or is this a roo only thing and they just haven't developed enough, yet? Thanks!