Hi, I have 8 straight run silkies. They are two weeks old tomorrow. Exactly 4 have tail feathers, the other 4 have no tails at all. Is this possibly indicative of sex? Just curious. Also I notice they are still sooooooooooooooooo small! My other chickens (standards) practically grew bigger in front of my eyes. They're still in with two packing peanuts and the boys are huge compared to them.