I have 5 silks and they are about 2 months old. I do think 2 of the 5 are roo's. I know these breeds are calmer. Will I need to separate them as they get older? Thanks.
The cockerels should be fine together as long the the submissive one has space to get away from the dominant one. However, two cockerels is way too many for only three hens - heck, even one cockerel is liable to be too much for just three hens. You'll need to either get more females or separate the males.