2 weeks ago we got 6 chicks from Tractor Supply. The sign said Amber pullets (I think that means Amberlink?). We figure the chicks are about 3 weeks old, assuming that the store really does get a new shipment of day old chicks every Monday (we bought the few they had left on a Sunday). The past couple days we have noticed 2 chicks that have much more pronounced combs. They extend further up onto their heads and are taller. No other real differences are noticed except perhaps some more aggressive behaviors (ie: pecking at our hand when we reach in, and jumping onto the other chicks and trying to chest bump them). I've heard that the chances of getting a cockerel from a feed store selling pullets is 1%. Is it possible that we got not only one but two?? Here are some pictures. #1 and #2 are of one of the suspected cockerels whose comb is much more pronounced but not different in color. #3 is one of the chicks with a smaller comb. Thanks for you help!