Are there any tips for training kitties from tracking litter all over the house? I'd love to keep it in the box and for them to wipe their paws on the litter mat so I'm not tracking it around too. Also, after they've used the box, they sometimes scoot around to clean their butts and it gets litter and feces on my rug. Should I provide a new rug special for them to scoot around on? Is it unreasonable to expect them to wipe their paws?