I have 4 chicks that are about 2 weeks old. One of them usually stay away from the others, but it still goes with the others if something big is happening, like if they get a new treat. the chicks head is a little lighter than the others, and it is a little taller and already has a slightly larger comb, but its still just coming out. Im wondering if it's a rooster or a hen thats just a few days older than the others. If it's a rooster we have to send it back to the hatchery hopefully she's just older.