If you understood rooster behavior and the hierarchy than you would know that a dominant rooster commands respect and chases submissive ones when he feel like, he doesn't turn his back or allow himself to be attacked, the problem comes from people handling their roosters as chicks, they become equal to the keeper, I don't abuse my birds, I keep multiple roosters and never have I've been attacked, they move out of my way and they respect me. Perhaps the OP can try to retrain her rooster, especially if it's just trying it's attacking skills out, but usually the conditioning done during the first few months of life will set the rooster up for who he will be and how he will act. Sometimes confining a young rooster will allow him to calm down and mature and not act in an aggressive manner, that's why I suggested penning him separately, though he will never be cuddly anymore.