I have 28 7 week old straight run bantams. 10 Cochins, 9 Brahmas and 9 New Hampshires. What is the best way to identify the roosters for culling at this point. By comparing the same breed some have larger combs and are larger in size. I am assuming that these are probably roosters but just want to make sure. My end plan is to keep about 15 birds, but only one rooster. Thanks!