I hatched 5 black australorps Thanksgiving weekend, so they are approximately 4 months old now. I know I have a couple of roosters in the mix, but not sure how many. I want to keep the prettiest one and give the rest of the roosters away. I'm wondering when they will finish developing and when I will know which one is the prettiest? I can tell that one has a lot of red on his neck and think he might end up being the prettiest. Also, he is less aggressive than one of the other roosters, so I am leaning toward him. Any thoughts?