Hey! I might be duplicating the other response, but here is my experience. I tried to teach my puppy to go outside, but I was intrigued that you could teach a small dog to go in a litter box. Anyway, I tought her pretty much the same way you teach a dog to go on paper. If you see her looking for a spot, or if she tries to go somewhere, take her to the box and keep her there until she goes. It took a while for me to train my dog. I'm not the best teacher in the world and bless her heart she's not the brightest dog in the world. But believe me, if my dog can learn, ANY dog can learn!
steph