Sorry I can't remember these all hatched in October. But it was pretty easy to tell them apart. The boys grew fast the 2 I kept I hand put leg bands on to save since they grew the fastest. The rest we butchered a few months ago. By 10 wks old the NN Roos were the size of my RIR hens. The NN hens are much smaller.Quote: How young were the boys when they got the red all the way down the neck???