If house cats were 100lbs. heavier, they would eat us. They think of us, as THEIR pet. My cats curl up and snooze in the sunlight streaming in, and make no effort to look up when my wife or I make any noise. They do that because they genuinely believe they are the apex predators of the house, which, of course they aren't. I know they don't comprehend opposable thumbs, and the ability to handle a firearm, so they can't be the apex, but they think they are. No fear, total security in their space. My house, and I worry about security, more then they do.