What gender is my chicken?

[NinjaGuinea]

I have four chickens, who are about 14 weeks each. From all of my previous knowledge, I had only one rooster. But then, one who clucks and does not have a comb made a noise which sounded kind of like a crow. It was only one syllable, and the "roosters" are not attacking each other. What is going on, and is this a hen or a rooster? Please help! if it helps they are frizzled bantam hens.

 

[BullChick]

First thing you need to do is show a picture or two. Second, roosters don't usually attack each other when they are raised together. As for the noise, even hens can learn to crow. But it may just have been a strange noise, and nothing more.