The purchase is from the highest-rated unit to the lowest. Stars scores are depending on recent customer reviews so they may be subject to alter. To see the review in-depth, with Positives and negatives, click on the link on your preference: We usually suggest clumping litter in the Litter-Robot but https://petskyonline-onlinestrore.blogspot.com/2025/07/petkit-purobot-ultra-premier-auto.html