They're about a month old (on the 3rd) one has no comb to speak of and is cute and chubby and quiet, the other two live on top of the food and waterer with thin orange combs. The fourth has a snappy red comb w/ the start of red wattles. Question of the day: I assume the 4th is definately a roo, but how far developed or red should the combs be at a month old to be a roo? Here's hoping I have 3 hens. I can post pics tomorrow.