Actually, the butterfly effect is the theory that a butterfly flapping its wings in China can cause a hurricane halfway across the world, or the like. It's the same general idea, though - a tiny action can have drastic effects.
Looks more like a cat right now, to me. Ref pics are your friend. Even if you are going for cartoony, eyes should be smaller, the muzzle should be more pronounced, and canines' incisors don't usually poke out from beneath their lips like that.