We have recently purchased 3 light sussex hens (approx 7-8 weeks old at the moment) and I am no expert but I think one of them is a rooster. I was wondering what your opinions were based on the picture. The one at the top is the hen and the one with the darker more defined tail feathers right next to it is the one i suspect is a rooster. He also has yellow legs and the other two have white legs and his comb is darker too. Thoughts?