The Company of Animals Pet Correctors EMITS A HISSING SOUND through a quick burst of compressed air that mimics the warning hiss of a snake or cat to distract the dog, so you can teach better behavior and commands such as quiet, sit, leave, and stop SAFE & HUMANE way to retrain canines to prevent excessive barking, jumping, stealing food, digging and chewing EFFECTIVE TRAINING aid to correct bad habits; jumping on furniture, counter tops or stealing food TRAINER & BEHAVIORIST RECOMMENDED Pet Corrector was created by Dr. Roger Mugford and is used and recommended by trainers and behaviorist throughout the world