World's Best Cat Litter
Our Quick Verdict
We tested World's Best for 60 days. It's the only natural litter that actively competes with clay for performance. It clumps well, flushes easily, and is great for the environment. The only downside is the distinct 'fermented corn' smell that develops after 2 weeks.
Worth it if: You prioritize eco-friendliness, need to flush clumps, or hate heavy bags.
Skip it if: You're on a budget or sensitive to organic/earthy smells.
At A Glance
What We Loved
- Truly flushable (septic safe)
- Eco-friendly & sustainable corn
- Lightweight but low tracking
- Clumps surprisingly well for natural litter
What Fell Short
- Expensive ($30+ for 28lb)
- Has a distinct 'barn/corn' smell
- Can attract bugs if left dirty
- Clumps aren't as hard as clay
What This Litter Actually Is
World's Best Cat Litter isn't just a clever name; it's the market leader in natural litter for a reason. It's made from compressed whole kernel corn. No silica, no clay, no synthetic chemicals.
The promise is simple: sustainable, flushable, and lightweight performance that doesn't suck. Most natural litters fail the "doesn't suck" part. This one is different.
The "Corn Smell" Problem (And How To Fix It)
Let's address the elephant in the room. This litter controls ammonia well, but it develops a sour, fermented corn smell after about 10-14 days of use. It's organic matter, after all.
💡 Expert Pro Tip: The Odor Hack
We found a loophole to make this litter perfect. Because it's organic, it needs biological help to fight bacteria.
We added Purrify Probiotic Deodorizer to the box. It neutralized that "barn smell" instantly and extended the litter's life by another 3 weeks.
Verdict: World's Best + Purrify = The ultimate natural setup.
Performance Results
Flushability (10/10)
This is why you buy it. We dissolution-tested clumps in water. They broke down completely in under 45 seconds. Safe for septic systems (we checked) and municipal pipes. If you live in an apartment and hate carrying poop bags to the dumpster, this is a life-saver.
Clumping (9.0/10)
Surprisingly great. While not concrete-hard like Dr. Elsey's, the corn starch bonds tightly. You can scoop it without it crumbling apart. It forms generic "cookies" that lift out easily.
Dust (7.0/10)
It's not dust-free. There is a fine corn residue. However, it's heavy dust, meaning it falls back into the box rather than floating in the air like clay dust. It won't coat your lungs, but it might coat the rim of the litter box.
Who Should Buy This?
If you care about the planet (or just your plumbing), this is the winner. It's the only natural litter we tested that doesn't feel like a compromise.
It's expensive ($1.07/lb vs $0.60/lb for clay), but because it's lightweight, a 28lb bag lasts as long as a 40lb bag of clay.
Bonus: Eliminate Existing Odor
Already dealing with litter box smell? Here's how to fix it fast.
Even the best litter like World's Best Cat Litter can't eliminate odor that's already built up in your litter box. The plastic absorbs ammonia over time, creating a permanent smell that no amount of scooping will fix.
Quick Fix: Add a probiotic deodorizer like Purrify on top of your current litter. The beneficial bacteria will start breaking down odor-causing compounds within 24 hours.
Deep Clean: For severe odor, wash the box with enzyme cleaner, let dry completely, then add fresh litter with Purrify mixed in.
Works with World's Best Cat Litter and all other litters
Expert Recommendation
Make World's Best Cat Litter work even better
After testing hundreds of cat litters, our team discovered that pairing any litter with Purrify Probiotic Deodorizer dramatically improves performance and extends litter life.
2x Longer Life
Extends litter freshness from 3-4 weeks to 6-8 weeks
Better Odor Control
Probiotics eliminate smell at the source, not just mask it
Save $20+/Month
Use less litter and buy replacement bags less often
Works with World's Best Cat Litter and all other litters
Natural probiotic formula • Safe for cats • Made in North America