Deffo clumping every time! Would never go back to non clumping now. Cats Best is a brilliant clumping litter. Its wood based and it clumps into easily scoopable clumps leaving the rest of the litter clean and dry. I don't use the convential plastic scoops with the holes in, I use a large metal serving spoon as I think its easier to keep clean than the plastic scoops. It is supposed to be flushable but I always bag and bin it. Its only downside is it does track a lot the Petfood Warehouse - Cat's Best ÖkoPlus Clumping Litter - For Kittens & Cats - Make unpleasant indoor odours a thing of the past! - Pet Products Delivered to Your Door