A litter and litter making method producing animal litter from a carbohydrate starch-containing cereal grain admixture extruded from an extruder forming self- clumping pellets having a clumping agent formed during extrusion composed at least in part of carbohydrate polymer binder. Each self-clumping litter pellet is extruded under conditions that cause formation of carbohydrate polymer binder clumping agent at least some of which is water soluble. One method of extruding litter pellets causes starch dextrinization such that at least some of the clumping agent in each pellet is formed of dextrin. Each pellet can be coated such as with a smectite like bentonite. During use, clumping agent in a pellet wetted with urine dissolves and flows in between and along adjacent pellets causing them to self-clump.