Naturally Fresh Walnut is the strongest all-around pick in this comparison for natural clumping without corn.
A walnut-shell litter that clumps harder than many natural competitors and absorbs odor naturally without added fragrance.
Flushable, lightweight, and eco-friendly corn litter with surprisingly strong clumping for a natural option.
Corn against walnut. World's Best flushes and barely leaves the tray. Naturally Fresh held more clumps together in our drop test and costs less per day. Its dark granules hide what you are scooping, and more of them end up on the floor.
This comparison page is maintained by the ReviewCatLitter editorial team and grounded in the same scoring framework used across the published review catalog.
Choose between them on texture, clumping, dust and price. Then, if the room still tells you where the box is, Purrify is activated carbon you mix into whichever bag you chose. It is what we use in our own homes.
Read our Purrify guide to plant-based litter and odor control.
Every figure below is a reading from our own test runs, not a rating. Where a run never took a reading it says so.
| Reading | Naturally Fresh Walnut | World's Best Cat Litter | Gap |
|---|---|---|---|
| Dust weighed per pourDust caught on a filter and weighed while the bag goes into the box. Lower is better. | 0.13 mgbetter | 0.15 mg | 0.02 mg |
| Clumps that survived the drop testShare of clumps still whole after a three-foot drop. Higher is better. | 89%better | 76% | 13 points |
| Ammonia after one dayParts per million above the tray, 24 hours in. Lower is better. | not measured | 2 ppm | only one side measured |
| Bag priceWhat the tested bag cost. Bag sizes differ, so read it next to cost per pound. | $24.99 | $29.99 | $5.00 |
| Cost per poundBag price divided by what is in the bag. Lower is better. | $0.96better | $1.07 | $0.11 |
| Cost per dayWhat the box costs to keep running each day. Lower is better. | $0.54better | $0.58 | $0.04 |
| Cost across a yearThat daily cost carried over a full year of use. Lower is better. | $197better | $212 | $15 |
Neither run recorded granules outside the box and ammonia after three days, so those rows are left out rather than filled in from a similar bag. The full test data shows every reading we have.
Primary tradeoff: Naturally Fresh Walnut's weakest area here is tracking.
Best dust control here at 0.13mg per pour.
Strongest odor control in this set with strong natural absorption.
It is also the cheapest daily option at $0.54 per day.
Scroll sideways to see every litter. Scores are editorial judgments out of 10.
| Product | ||
|---|---|---|
| Overall Score | 8.8Very good | 9.1Excellent |
| Pricing | ||
| Price | $24.99 | $29.99 |
| Weight | 26 lbs | 28 lbs |
| Cost / Day | $0.54 | $0.58 |
| Performance | ||
| Dust Control | 8.1 0.13mg per pour | 7.8 0.15mg per pour |
| Clumping | 8.9 Hard for natural litter | 9 Excellent for corn |
| Odor Control | 8.4 Strong natural absorption | 8.2 Good with daily scooping |
| Tracking Outside the Box | 7.4 Moderate | 9 Minimal |
| Value for Cost | 8.1 $0.54/day · $24.99 | 7.2 $0.58/day · $29.99 |
| Features | ||
| Type | Walnut Shell | Corn Litter |
| Flushable | ||
| Scented | No | No |
| Our Verdict | ||
| Best For | Natural clumping without corn | Eco-conscious owners who want flushable litter |
| Read ReviewCheck Price | Read ReviewCheck Price | |
Naturally Fresh Walnut makes the most sense for natural clumping without corn.
You want a walnut-shell litter that clumps harder than many natural competitors and absorbs odor naturally without added fragrance.
You need a formula that solves natural clumping without corn better.
World's Best Cat Litter makes the most sense for eco-conscious owners who want flushable litter.
You want eco-friendly and flushable litter with very good daily usability.
You're on a tight budget or want the absolute lowest dust numbers.
The nearest options to this matchup on score and on price.
Runs at $0.80 a day. Its dust was never weighed.
Weighed 0.15mg per pour and runs at $0.72 a day.
Weighed 0.04mg per pour and runs at $0.55 a day.
Naturally Fresh Walnut comes out ahead on the balance of dust, clumping, odor control, tracking and daily cost. World's Best Cat Litter is still the one to buy for eco-conscious owners who want flushable litter.
Naturally Fresh Walnut runs at $0.54 a day against $0.58 for World's Best Cat Litter.
Naturally Fresh Walnut scored higher: strong natural absorption, against good with daily scooping for World's Best Cat Litter.
World's Best Cat Litter keeps more litter in the box: minimal, against moderate for Naturally Fresh Walnut.
Ultra is the cleaner and cheaper daily litter. World's Best is the one to pick if you want to flush the waste and stop hauling heavy bags.
Ultra holds its clumps better and pours less dust. Naturally Fresh is the plant litter that gets closest to it, for a little more per day.
Clump & Seal is the cheap perfumed clay. World's Best is the flushable corn litter with no added scent.
Naturally Fresh is the way out of fragrance and heavy dust without paying premium clay money.
World's Best is the corn litter most people start with. Sustainably Yours is the one that clumps harder and keeps more litter inside the tray.
Naturally Fresh is the cheaper natural bag and clumps nearly as hard. Sustainably Yours flushes and tracks less.