Snappy Trainer 3 Pack Cat Dog Puppy Bad Pet Behavior Corrector Training Method Effective with most pets - large and small dogs, cats and even rabbits. It's effective - the pet's behavior is corrected the instant they misbehave. It's humane - the pet is not harmed or shocked. It requires a minimal time commitment from the pet owner - easy and fast to set up. It's space efficient - works in small places like chairs, spaces on countertops, etc.