I use Second Nature Litter Box for Dogs for Paco my Yorkie. Go to the link below to know what I am talking about
:
http://www.secondnaturelitter.com/Ge...5470&T=4255025
Paco is doing very well using the second nature... he did it by himself... when I leave him free around the house. Just teach him one Spot in your home.
Right now, Im teaching him to use both outside and second nature when we are out or he is free at home. But this method work...
Hope this information can help you out... you can buy it at petco and petmart Store.
Libna