Petlot pet pads come in four sizes: XXS, S, M, L, and XL, suitable for different pets and various scenarios. For example, when training a newly purchased dog to use the toilet: 1. Place the pad in a fixed location; 2. When the dog shows signs of defecation or urination, immediately urge it to go to the pad; 3. If it defecates or urinates outside the pad, scold it; 4. If it can accurately defecate or urinate on the pad, reward and encourage it to learn to use the pad as soon as possible.