Quote: i find that in the reds (and silvers too) the pullets head markings are darker and wider than the cockerels too... not only being well defined.
in the pic above, the sg's were all pullets, the one toward the bottom with it's head on the sg back and the one who's head is at the very bottom were both pullets too.
the lightest one with just the dark stripe, and the 2 below and to the right were cockerels...
of that hatch (combination of my own and sandhill reds) i ended up with 20 pullets and 7 cockerels. LOL (plus a few oddballs in the mix too, like the lavender cochin off to the right).