We're raising chicks for the first time and we got a few "Cornish Roaster" birds from McMurray along with some dual purpose breeds. They are about 2 weeks old now and are huge in comparison to the dual purpose birds. I realize they grow faster, but I'm shocked at the difference. They're probably 3 times the size. We have them in the same brooder so the meat birds eat as much as they want. Is this okay or will they overeat and die/have problems? Here's a picture of one of them at 10 days versus a buff orp. Normal size difference?