Here are the best sifting litter box for pine pellets: Large sifting litter box: So Phresh Lift-to-Sift Cat Litter Pan  High sides sifting litter box: Van Ness CP5 Sifting Cat Pan For clumping litter: Pet Mate Arm & Hammer Large Sifting Litter Pan  For senior cats or kittens (low entry): Petmate Sifting Corner Litter Pan … Continue reading Best Sifting Litter Box For Pine Pellets (Don’t Always Follow The Manufacturer’s Instructions)