A cat litter sieving system comprises a litter handler convertible between a flat configuration, an open container configuration, a transport configuration, and a disposal configuration, and sieve. The sieve comprises a riser to retain a frame at a selected distance above a litter box, said frame supporting a mesh member having a perimeter and defining a plurality of holes therethrough of sufficient size to permit granules of cat litter to pass through while retaining clumps of cat litter.
