The Best Cat Litter Depends on Your Cat and Type of Litter Box

Clumping clay cat litter is what I recommend for most people, as it primarily uses a naturally absorbent bentonite clay. It expands when wet/soiled, making it "clump," which is easier to scoop and generally more hygienic. However, it's not as environmentally friendly because it's not biodegradable and can contain carcinogenic silica dust.