I've read that it is best for a cockerel to be raised with older hens, and perhaps an older rooster that will check some of the adolescent craziness. Are there other flock dynamics involved? I'd be interested in what your experience has been.
I'm in the same boat, trying to assess the temperament of 4 month old cockerels as potential replacement roosters.
I think I got really lucky with my first rooster. I got him as a 4 or 5 month old "freebee" and put him in with 6 month old hens. They did a good job humbling him, and other...