At my old place I had enough space so that the roosters rarely fought....I had 7 roosters at one time. Bit by bit I placed these extra roosters with other folks or lost them to predators. At this new place the orientation of the poultry space is such that multiple roosters won't work. In addition, I have one neighbor who is not very accepting of rooster crowing although the local ordinances have zero restrictions in terms of farm animals. When I moved in 2007, I brought all the hens I had at my old place with me (I was rooster-less after a raccoon break-in to my old coop). I rescued a dumped light Brahma rooster (one of my favorite rooster breeds) the next summer. Last July a hen hatched out 11 chicks and 4 were roosters (lucky sex ratio)...and the hen herself was roughly 8-9 years old so that was a surprise! At roughly 5 months of age, they started crowing and assaulting the hens. It got so rough that the hens refused to come out of the coop....not a good situation. The disruption of the social structure was traumatic enough to help me do what I had to do....gather the guys up in a dog crate from the roost in the evening, drive them to a co-worker who had agreed, and next day I got an empty crate back (sigh). And life in the poultry pasture was MUCH calmer. All of the roosters I initially dealt with were purchased as sexed pullets (NOT straight run!). Seems to happen frequently with light Brahmas and barred rocks. After the initial rooster influx, I dealt with the results of home hatchings.
I've got 8 new chicks this year....so the cycle continues. Can't tell yet what sex they are....hatched in the first 2 weeks of June from 2 hens...a week apart.