The many disadvantages to the method and why you should concentrate on other methods, using paper training as a fall back.. (labradortraininghq.com)
People who choose the pad / paper training method often do so because they know the puppy will not have outside access as often as he will need to eliminate. (nylabone.com)
The second problem with paper training is that you may unintentionally teach your pup that is is acceptable to eliminate inside your home. (farmlandvet.net)