I have 2 questions. 1. I have heard that when a chick is about 2 or 3 days old you can tell if it is a hen or a rooster by the pen feathers on it's wings. If they are all straight and even it will be a rooster, if it is odd and uneven then you have a hen. But you can only do this right after they start feathering. Has anyone else heard this? 2. After I have figured out the sex I want to put bands on the legs of the roosters, any idea on what to use? Zip tie, rubber band?