I have three chicks, that are a bit over 5 weeks old. They were listed at the feed store as Ameraucana. What are some ways to tell the girls from boys? Is the color of the comb, a good way? What about tail length? Here is a pic of 1 of the 2 I fear may be roosters. It is the chick with the whitish grey head. Any thoughts? This chick and one other have longer tails ( but the tails are still at the messy growing stage), and pinker combs, but no waddles, and no spurs yet. The feathers do not look more pointy, and there is no curve yet to the tail feathers. When can I expect to hear crowing if they are male?