Pet Corrector - Snakes, insects and birds such as geese use their hiss sound to drive off predators and domesticated pets have an instinctive sensitivity to this sound. The Pet Corrector emits a hiss of air which mimics this sound, to interrupt undesirable behaviors in dogs such as jumping up or stealing. There is a detailed training guide included, with helpful training tips and key dos and don"ts. It is important that the Pet Corrector is used responsibly and that alternative desirable behaviors are rewarded. It is available in 30, 50, and 200-ml. sizes.