Purina Tidy Cats Designed for Litter-Robot self cleaning litter box for cats is specially formulated for The Perfect Cycle setting in the Whisker app Powerful odor control for Litter-Robot 4 and previous generations, with odor-absorb technology that minimizes odors in the waste drawer Hard & fast clumping litter maintains strong clumps throughout The Perfect Cycle for peak Litter-Robot cycling performance Motion-activated revitalizing scent scented cat litter gives your litter a fresh, clean scent boost with every cycle Tidy Cats multicat litter is the brand most often recommended and personally used by veterinarians. (2024 Veterinarian Survey, Forward Group)