"I have been using these training pads for my pups, now 7 weeks old. The puppies seemed to know what they were for from the beginning, preferring the pads to newspaper or the floor. On their first time outdoors, they immediately used the grass for their "business", so I guess the "new-mown grass scent" really does work. A real plus was that their tiny needle-sharp toenails didn't catch in the fiber cover of these pads as they did in the other brand I tried."