Our Speckled Sussex is in sollitary - in the freezer. The first time he got aggressive toward a couple of the hens, he got a reprieve but he was watched closely. Then he came after me one morning - and by mid afternoon he was chilling in the refrigerator. I know that a lot of people have very successfully rehabilitated nasty roosters, and I'm very glad that it all worked out for them. But around Oleo Acres aggression = gone. I have three beloved grandkids - two live across the street and one lives two blocks down. The littlest one is 3 and Kendra's been in her wheelchair since she was 9 months old. One of the others is her sister Katie and their cousin, Evan. Katie is 9 and Evan is also 9. They are my chicken sitters when we go out of town, which we do frequently for Ken's fraternity. I need those kids to be totally comfortable out there. I need Kendra to be safe enjoying the yard in her chair even when the chickens are out foraging. I don't want any of them getting hurt, naturally, but I also don't want the older two to become afraid to work out in the coop and run. They love to come over and help gather eggs, feeding and watering, and they don't even mind cleaning the poop board. But that wouldn't last two minutes if they had reason to fear the chickens. I figure even if I had worked with Speckles and "trained" him not to be aggressive toward me, there was still no guarantee that he'd apply what he'd learned to the kids.
Lots of people have friendly roosters. If I want a rooster in my flock, I'm willing to wait until that kind of roo comes my way.