I have a five week old Rhode Island Red that seems way different than the others. It is a darker shade (feathers) than the others and has a slightly more developed comb than the other chicks. When I put one of my one and one half year old hens in with them the other chicks were wary of her , but this bird attempted to attack the hen. Are my assumptions correct and it is a cock or is it a confident pullet? I will try to post some pictures later. Thanks!!!