I think I was right about my big chicks, that there are 3 or 4 pullets, 6 or 7 cockerels. I'd say three are for sure pullets, and another one I'm close to sure, so that's perfect for my needs.
In addition to the wattles and the larger combs the cockerels grow long black irridescent tail feathers, but not the pullets. They're about 9 weeks old now.
I moved the new chicks (3 weeks old tomorrow) out to the trailer-brooder in the shop, with the ceramic heater on. I had to teach them how to eat wetted crumble mash. They didn't know it was food until I sprinkled dry crumbles on top.
I have no idea of the little chicks' sexes, but another 2 or 3 pullets would be perfect.
Now that the old barred rock hens are gone, the two old cockerels (36 weeks) are overmating a few of the remaining 6 pullets. I'm going to move the pair of them into the new run where the teenagers are now, and I'll integrate them into the other run with the six pullets.
I know for a fact that the "favorite" pullet of both boys has pretty much stopped laying, and I suspect it's because of stress induced by overmating. I want to find out if moving the cockerels to a batchelor pad will get her laying back on track. Some of the other pullets are laying regularly.