My stepmom has no trouble with her 3 rooster. She let them know early on who was boss she would spray them with the hose and also grab them by the neck and shake them...how she did it I am not sure but those roos don't bother anyone. We don't have roos and after hearing all the horror stories on BYC I am always weary when we go visit my dad and stepmom. But the roos never bother me or my kids (they are the ones I was really worried about)...I guess the shaking and hose was enough to keep the roos at bay. Good luck. If he is that aggressive it's probably better to let him go. good luck