I'm almost 100% positive this has got to be a cockerel. He is about 9 weeks old now. Shiny feathers, green in the tail, comb much redder than my other RIR, and he was much slower to feather than my other one. Those are all signs right? (I actually had him pegged as a potential roo at about a week old because he was so behind the other in feather development.) But, I've been wrong before when I was very sure, so I'm double checking.