In 1947, Ed Roy, the father of cat litter, founded kitter litter. He chose a very absorbent natural clay as cat litter, which not only absorbed cat urine well, but also reduced some odors. , natural clay has also been used as cat litter for a long time. Later, in the early 1980s, biologist Thomas Elson discovered a clay bentonite, which became a new material for cat litter.

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In addition to these two types of cat litter, there are also paper cat litter, wheat cat litter, corn cat litter, pine cat litter, There are different options such as tofu cat litter, peanut shell powder cat litter, processed orange peel cat litter, etc.