That is a smart move. I always hope for just one more hen whenever I let any hatch out but my one hen throws off mostly males. I wasn't sure whose eggs were being hatched out since both of my hens were sitting on the nest starting out. The one that throws off mostly males is the one that flew out of the pen I had them in and the other had never hatched any out before so I was hope full. Drakes are just my luck. I should have known that when I raised 3 Sons and never had a daughter, lol.I've ordered sexed chicks for years and don't have a rooster in my flock. I had to order two in my last batch of pullet chicks. (My tractor supply didn't have any cockerels last fall)