Those are pretty little birds ya got there! By the looks of it, all of them are pullets except for the one with the larger and more red comb in the first and second pictures. It could be a female who has sped up in the maturing process, but if they are all the same age and especially if you have more of his same breed showing a smaller comb, he's probably a boy. Also pay attention to their pecking order. If the one with the more pronounced comb seems to be towards the higher end of the totem pole (aka pecking order), you probably have a rooster on you hands. But like I said, all others in your pictures seem to be female. Hope this helps!!
Thank you, that's exactly what I was thinking. There are 8 of them, all from the same hatch, and the two that have been noted as roosters are the only ones with the larger, more bright colored combs. They are also slightly larger than the others too but since they are with the adults a pecking order is hard to determine since they are still staying somewhat grouped together. They're my first chicks and I appreciate everyone's input.