Used with our Four Paws Wee-Wee Dog Grass Patch Tray, our Four Paws Wee-Wee Dog Grass Replacement is a great indoor or outdoor potty-training solution. This small dog grass pad has built-in attractant that helps draw your dog to the pad and lets him know where to "go." The realistic dual-length dog training grass gives the patch a more natural feel under your pup's paws. Dog replacement grass available in small (20 inches x 20 inches) and medium (20 inches x 30 inches).