I've got a roo who is a great flock protector -- too good, in fact, as he considers me a threat to the girls most of the time. He's free range, so it can be a bit of problem. The other day, he started coming at me and I picked up a length of 3' woven wire that I had curled into a circle/tube about 2' in diameter to use for compost materials. When he got close enough, I dropped one open end over him trapping him inside. It's big enough to let him move around a bit, but not big enough to give him room to really stretch out and make a leap to fly out (he's pretty big). Since then, I've been leaving that wire tube near the gate to the meadow, and when I go in, I just bring it with me. Roo comes near me, tube goes on, I do what I need to do, no problems. It has become my new favorite way of dealing with him, and it has also proven useful when trying to get my hands on one of the hens -- they don't even seem to mind it, especially if I drop a little scratch first.