Sounds like you have a great rooster!
While I went camping, I left my then ten chickens with my neighbors. A few days after I had left, a hawk came down and tried to attack them. The rooster herded the hens under the trailer that the coop was on, and then came out and attacked the hawk, pulling out a tail feather and scaring it away. I have only had a hawk take a chick once, and no other predator problems.