The Potty Training Aid Trigger-spray (470ml) is a spray designed to help house train your puppy. The spray is scientifically formulated to attract your puppy to the spot. You simply spray the solution where you want your dog to ?go? it can be used indoors by being sprayed onto pads or newspapers or sprayed outside on the area of the garden you want your dog to urinate. You should praise your dog when it uses the correct area to urinate in order for your dog to repeat this.