Hi There! Welcome to YT.
I have never litter trained a dog, I know they have so many different ones now. They have boxes with grass, and some with little pellet type.. You can research Littler Training for dogs and see what else comes up.. I know a couple YT member do litter training so hopefully they come on and help ya. In the meantime I have found a couple links for you.
Rascal Dog Litter Box - Home Fun Tip For Potty Training Puppies: Try A Dog Litter Box! from The Fun Times Guide to Dogs
I have also done a search on YT and found these threads-
http://www.yorkietalk.com/forums/sea...archid=6609406
My 6 year old isn't really 100% trained so I don’t want to tell you what I have done, because I’m a mess! LOL
Good luck to you, and I’m glad you found us!