The only ones I am sure of is my black sex-link roosters. He is about 10 weeks old. His daddy was RIR and mama was a BR This is a chick one month old, I got out of the heavy bin at Atwood's. It is large and aggressive. I feel like it is a rooster. This chick one month old, was black until a few days ago now white and brown is coming in. I thought is was either a Jersey Giant or an Australorp but now I have no idea. No sign of a comb yet, so maybe a pullet. I have some more pictures but am having trouble getting them downloaded. I will try again in a few minutes.