Ace my now 1yr old toy fox terrier has always used his puppy pads for all his business. When I got him I tried newspaper and taking him out frequently, but none of that worked. I started using puppy pads and I haven't had any trouble with him since! If it's not his pad he won't go-literally! He'll hold it in or look at you like "where's my pad mom?" It's kinda funny. Ace will only pee outside but will not poop. I guess he thinks his poop is too good for the outside !!! haha Anyway I guess the scent or something in the pad lets them know to use that instead of the carpet.