The origin of cat litter can be traced back to 1947, ‌ when an American woman couldn't provide her cat with toilet material due to the cold weather, ‌ the sand was frozen, ‌, and ‌ asked her neighbour Ed Roy for help. ‌ Ed Roy recommends a very absorbent natural clay called ‌ Fuller's clay ‌ which not only absorbs cat urine very well, ‌ also reduces some of the odors. ‌ when Kay took the clay home and used it, ‌ did so well that ‌ Ed Roy sold it in paper bags to pet stores under the brand name ‌ KITTY LITTER and ‌ started the history of commercial cat litter. ‌

‌ The types and functions of cat litter have evolved and improved over time. ‌ In the early 1980's, ‌ biologist and veteran cat owner William Mallow invented a kind of curdle clay litter. ‌ stands for bentonite litter. ‌ the litter absorbs water and quickly clumps together. ‌ the clumps just need to be scooped out each time. ‌ is a favorite of cat owners. ‌ Since then, in order to pursue cleaner, ‌ more absorbable and ‌ more convenient, ‌ cat litter production has been changed and improved constantly, and more kinds of cat litter including ‌ with silica (a kind of ‌ quartz) ‌ have appeared. ‌ These innovations revolutionized the cat's place in the human family, ‌ made owning a cat a more elegant and fashionable thing to do.