When Animals Attack! featured footage of animals attacking humans. Of course, animals can “attack” in different ways.
I doubt if Penny would intentionally attack anyone in the conventional sense. That would be unseemly and require too much exertion.
Nevertheless, Penny still is a key component of our household defense system. If an intruder invaded our hearth and home, he could easily be disabled by tripping over Penny’s snoring body stretched out on the kitchen floor. As is the case with any natural predator, her brown coat blends seamlessly with the color of our wood flooring, making her an even greater hazard for the unwary housebreaker.
Or, the miscreant could pull a muscle or throw out his back trying to move Penny’s dead weight from her prone position.
Or, if the trespasser had any scrap of food on his person, Penny might inadvertently knock him down in her single-minded quest to fill her belly.
Some people have dogs that growl and bite. We have a dog that sleeps.