Why should pets' nails be polished? 1. Because pet dogs often play indoors, their nails are too sharp, which can easily hook the carpet or other places and cause danger; 2. Dogs who often exercise outdoors can use the rough ground to wear their nails to achieve balance, while dogs who often exercise indoors have less nail wear; 3. Long nails will cause inconvenience to the dog's activities, and proper polishing will make him more comfortable.