Out of all the MPC chicks that survived, I got all pullets, just as I ordered. But I know that sexing is an inexact science. The roos I ended up with came from feed store chicks. I got a couple to replace the ones I lost, then a couple more just because they were chicks and they were there. Out of 6 feed store chicks, 3 were roos. Yep. <sigh>