Stopped by a local feed store to pick up some items. I always look at the baby chicks regardless of whether I need them or not. The sales person said they were Black Sex-Links and guaranteed to be pullets. I said, well, I don't need any as I had just hatched out 12 mixed breeds. He was like "oh..no you're gonna have mostly Roosters". I said really? Why? He said mixed breed eggs always produce more roosters. Isn't there always a 50/50 chance? Then I got to thinking, if that's true, it would explain why hatcheries have more pullets then roosters. If it's not true, what does the hatcheries do with all the little roos?