Be careful what you wish for....if you want a rooster that's super aggressive toward predators you should realize that what we see as a predator might be something entirely different in a rooster's eyes. An aggressive roo can see your kids as a predator. The mailman or UPS delivery person. You, your spouse or your neighbor. This, of course, is not always the case, but there are plenty of "help, my rooster is attacking me" threads here on BYC. And I'm sure for every one who posts such questions here, there are others who don't - they pen or cull the over-aggressive roo and don't post about it. Most roos will do the best they can against threats to their flock, but that doesn't mean they are always victorious.