It was easy for me with Maya, we trained her with the litter box from the very start of potty training, instead of taking her outside when she woke up from a nap, or after she eat we took her to the litter box and made her stay in there until she went. We probably took her to the litter box often in the beginning and praised her when she went potty. I think it took a week or less to train her. She did put pieces of the litter in her mouth, but that stopped after she caught on that we did not like that. My daughter's yorkie did the same thing and he sometimes still does when he comes over to visit Maya, (must like to see if her litter taste better then his). There again we tell Casey, no, take it out of his mouth and he stops. I know it's looks gross to see them put it in their mouths, but it doesn't harm them. Like some one else wrote you must keep the litter box clean. On the bag of Second Nature Dog Litter it tells you how to use and they have a web site,
www.doglitter.com. I guess what ever way you choose to trained your dog, it takes time and lots of love. You have to keep an eye on a puppy all the time, and when you can't the puppy should be in a crate. When they do have accidents you have to take the time and show them where they should have gone. With some dogs it just takes longer to train, but don't give up, they do want to please you.
Maya's mom