This is my first time keeping chickens. We love caring for them and they are a lot of fun to watch! We enjoy the pet aspect, but we're also very interested in yielding eggs. I'm confused on how to establish their gender. One of them looks like a rooster, to me. But I'm not sure about the others... Hen? Rooster? Same bird, rooster? Rooster on the left,and hens? Hen? Hens?