I have not had a rooster fight off a predator yet, aside from sharp shinned hawks, but I had 2 survive a raccoon attack from a mature female coon during the night. I also had one survive 3 adult GSD mauling my flock for over an hour. I only lost 8 chicken hens, a muscovy hen, and a BBB jake. The feather trail from this Black Australorp covered several acres and looped around the house and up the driveway into the woods. That rooster kept the dogs busy for a long time and came out alive. I had around 80 birds at the time, all out and available, free ranging, unprotected, a lot more should have been dead.