The kindergarten classes at my mom's school hatched chicks and ducks this year - cornish cross, white leghorns, and Pekins. I took some Pekins and some CX... or so I thought. This is our first go with meat birds, so at first I was explaining the size difference as the pullets being smaller than the cockerels. Now the size difference is really dramatic - the big ones are at least 3 times as big as the little ones, and the little ones look like normal chicks rather than meat monsters. Take a look at these pictures and tell me what you think - do I have white leghorns mixed in with my Cornish cross? They're about 2 1/2 weeks old in these photos.