A cat litter device includes a drum rotatable about an axis for containing litter with the drum having a front and a backend. A cat opening is disposed in the front end and a waste exit is disposed in the backend, which is coaxial with the rotation axis. A filter is fixed for rotation within the drum between the front and back ends for sifting feces and agglomerated filter from the litter. The filter conforms to a drum interior to prevent breakup of fragile agglomerates. An exterior waste tube is in communication with the filter and the waste exit for receiving feces and agglomerated litter from the filter and transferring the feces and agglomerated litter to the waste exit. An exterior waste tube is coupled to the waste exit for enabling rotation of the drum thereabout and a collection bag is removably connected to the exterior waste tube for receiving and disposing of the feces and agglomerated litter.