I gave a mean rooster a year. This was a foolish decision, and mostly avoidance of the only real option, which was killing him. A lot of people talk about behaviors to stop the rooster from his attacks. Those might work for a determined and knowledgeable adult, but there was nothing to stop him from continually attacking my kids. After they had been attacked, they basically never went in the backyard again, thereby giving up all these activities: play in the playhouse, pick up eggs, give the hens treats (they like the hens), pick blackberries, put the chickens away at night and open their coop to the yard in morning, play in backyard. Our chickens free range in the fenced backyard.
I tried a lot of the techniques talked about here. I never gave way, I never backed down, and I made sure that he ran away from me after every encounter. But telling my little kids to do all that? One is only 5. They have no chance against our strong and agile meanie.
The day we got rid of Demonic Christopher was the day I experienced the Incredible Lightness of Being. You cannot imagine how happy I was, even with the blood spattered on me from the butchering process, to know that I, and the kids, would no longer get attacked. And I have never killed an animal, and I fall apart over my pets dying. Giving him away was out of the question, as I have heard there is cockfighting in my area. We weren't about to spend time/money building a separate coop to house a mean bird that then would have lost what little purpose it had, and would have lost its freedom to range also.
The next day, the kids were trotting out with baskets to get eggs, giving the hens treats, and picking blackberries.
DO NOT DO WHAT i DID AND GIVE THE MEANIE A YEAR OF TERRORIZING YOU. It does not get better. If anything it gets worse. The last straw was when I gave them the treat of watermelon rinds, carefully backed away 20 feet as I never turn my back on Demonic Christopher, then I turned and walked the last few feet to the gate and found myself attacked from behind. That was it. I called husband and said "Today's the day. I won't be attacked again."