Litter Robot four & my cat The Litter-Robot four, is the most recent automatic litter box launched by Whisker. It is actually perfect for multi-cat households as a result of its new updates. It contains a new layout which is more modern and compact, with 2 sensors, one of these https://bookmarkingfeed.com/story20110324/new-step-by-step-map-for-robotic-pet-cleaning