Cats can be particular about the style of cat litter they prefer.
Kitty litter can be made of clay, silica gel, grain, wood, paper, grass, or wood.
Business Insider had two cats test 28 varieties of cat litter.
They evaluated them for absorption, clumping ability, odor control, dustiness, and more.
The best cat litter overall is Tidy Cats Naturally Strong Litter, which absorbs moisture well, clumps tightly, and controls odors with charcoal.