Correct unwanted behaviors with this Rattle Can Pet Behavior Correction System for every size dog of all ages. Designed for professional dog trainers and pet owners alike, these cans correct barking, furniture climbing, digging, jumping on people, chewing and more. Simply shake the can vigorously when you see the dog misbehave and stop shaking when the dog stops the unwanted behavior. Includes 2 rattle cans. Comes packaged in a hanging box.