The Pet Corrector Stops: Barking, Chasing, Stealing, Jumping Up and Place Avoidance It works by emitting a hiss of compressed gas to interrupt a dog's unwanted behavior It is used and recommended by trainers and behaviorists throughout the world The inert gas has no smell, and is totally safe and works on most animals including cats, horses and more Free training guide, featuring tips and easy to follow instructions included in every pack