I've got 5wk old chicks I need to sex. They're getting too crowded now (pecking each other), and I have a home for as many cockerels as I want to rehome. I know it's early but I really need to downsize this group. I've got 18 left. This is my first time raising chickens. There are several who already have larger combs which are turning pinkish red, and I can see wattles as well. Is this a good indicator? I can put up pics of the more feathered out ones if it will help. Thanks in advance!