With this litter of pups, we still have the puppy pen set up according to the Misty Method, with the sleep area, feeding and play area, and potty area all separated, however, we have incorporated a litter box over the papers section this time around. (The puppies naturally want to keep their sleep and feeding area clean.) They instinctively head over to the potty area to do their business. Occasionally, they don’t get their back feet all the way in the box and will get some potty on the paper, but that is rare. We take our puppies outside every couple hours from the time we wake in the morning, until bedtime, so they don’t potty inside that often. If they need to go, they whimper and we take them out. They prefer to do their business outside. This method makes potty training a very natural and easy process. During the night, I was getting up every 3 to 4 hours to let the puppies out, so there was minimal mess in the litter box, however, this past week, (starting at 7 weeks of age) I have not gotten up with them every time they whimper. Once they realize I am not getting up, they stop whimpering and potty in their litter box. I am happy to say that it is very easy to clean, and I am really impressed with how well this has worked out for us. The Misty Method basically allows puppies to potty train themselves.