Play and Predatory Aggression
Cats are predators. It is in their instinct to hunt down and kill. Even though you provide a gourmet diet for kitty, he still needs to practice his hunting skills whether you like it or not. Predatory behavior is often characterized by long periods of lying in wait and stalking followed by an explosion of activity - the attack. It's common for a cat to creep up to a sleeping owner and playfully attack them in bed. Some cats sit quietly, staring at a wiggling toe then with lightening speed, they pounce and attack. Other cats lie in wait under furniture until a foot passes by, then their claw reaches out and grabs. Cat play is an extension of their predatory nature. It provides the cat with the opportunity to develop and sharpen its hunting skills, even if it never needs to go out and catch its own dinner.