In my own personal experience, I have encountered lots of unexpected roosters within the flock. You just cant tell the girls to hatch hens only! You can get saddled with a number of roosters very quickly. I have found that some breeds have more difficult behavior than others. The heritage of a breed and inherent factors can be a big contributor to your roosters behavior possibly. In days of yore, certain birds were raised for a sport known as cock fighting. Temperments and other factors made these birds perfect selections for breeding for that purpose. Not to say this hasnt been bred out of the birds you own but the hidden factors could still remain. Add to that the roosters purpose in life is to not only protect the flock but also reproduce. If for any reason they feel you pose a threat to their purpose or the flock, guess what, you just became their enemy! Some roosters I can manage well and work with and others I cannot. When I say work with, I mean handling and holding as much as possible. I spend more time with roosters than hens. Most seem to learn that I pose no threat, but some are still buggers. They go in the pot. Roosters have their own pecking order the same as hens do on a different level. Some can stay together and others cannot or will not last. Trust that they do compete for the ladies among other things. Its just natures way in the world of chickens. Hope you get a good one!