Puppy Potty Training Bells Teach your dog to communicate without scratching, whining or barking. Hang training bells on the door that your dog uses to go outside and follow the included training instructions to housebreak your dog. Advance Potty Training bells make training your new puppy a little easier! Hang the ribbon with bells on your door knob and teach the puppy to jingle when he needs out. Available in; Black, Tan Pawprint, Monkey or Flower designs.