Actually, now that I look closer at the pictures I see a triple rowed pea comb which usually indicates cockerel. How old is it?
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At first glance, she does look like a purebred Barred Rock, in which case based on coloring she's definitely a she. But like Rhodebar says, it has a pea comb. It is likely a Barred Rock/Ameraucana cross, and yes, the comb is looking rather suspicious. Do you know how old it is?