Cane corso is a good example. No logic just red mist to strange things. My friends corso would go apeshit on old ladies in the park with a walker or cane...my bullmastiffs would eye them and be aware and Curious but wouldn't bark and lunge like an idiot ...bullys were designed to be quiet until needed,to not show aggression until necessary. That's one of the reasons I love the breed. It's like if someone crosses your lawn,do you walk outside with a machete screaming like a maniac and hack them to death or do you watch them to see what they are doing before deciding how to act. That's what a bullmastiff does, figures it out then acts accordingly, just doesn't go off the deep end because a squirrel walks by.Thats smarter, more logical and more evolved. And frankly less stress owning a big dog...3 big dogs. Having said all that I never trust any dog enough to not pay attention to what they are doing when people are around.