We are pretty sure this is a roo, this picture is at 7.5 weeks. I think it has already crowed.. or is trying anyways. Since we are not allowed to have roos in our area, we will have to give it to a new home. Though I have already become attached to the little stinker. So before I actually give him away, I think I needed some reassurance that it is indeed a roo. It isn't aggressive, though is quite curious about what is going on around it. It eats quite a lot. From all of the local breeders we have got conflicting speculation. It's a dominant hen to its a roo. After researching on BYC it would be our safe assumption it is a roo, as most pictures posted (of 7-8 week chicks) do not have even close to the same defined comb and waddle.