Aside from the regular stuff you look at to determine boys from girls, i think the look in their eyes is very telling. The girls have more feminine looking eyes, i think. Males look more determined. And so, judging by the eyes, i think your black one is a pullet.
So have you picked the black one up to see if it says "eeeek!" or "Hey man, put me down!"?
LOL, Yeah Can i pm you a link to a photo bucket of pics of some chicks I am getting and see if you can sex them for me? I can't post them here because they dont belong to me yet? and I don't wanna invade anyone?