I've had four, across my entire life. Shinobi got his name because he used to do wall runs and back flips for his toys. Then when he hit about 15 pounds of muscle, he stopped being quite so nimble, and started just appearing in locked rooms, and getting through windows that were only about 2 inches open. He wouldn't play with kittens until they were big enough to take a trouncing, and that's what shaped my current cat into the little man he is today.