Walnut Shell (Natural)
Naturally Fresh Walnut
A walnut-shell litter that clumps harder than many natural competitors and absorbs odor naturally without added fragrance.
Overall score
8.8/10
Cost per day
$0.54
Reviewed Nov 18, 2025
Head-to-head comparison
Naturally Fresh Walnut vs World's Best Cat Litter: Which Should You Buy?
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.
ReviewCatLitter editorial teamUpdated Mar 6, 2026
This comparison page is maintained by the ReviewCatLitter editorial team and grounded in the same scoring framework used across the published review catalog.
Natural Corn
World's Best Cat Litter
Flushable, lightweight, and eco-friendly corn litter with surprisingly strong clumping for a natural option.
Overall score
9.1/10
Cost per day
$0.58
Reviewed Mar 6, 2026
Overall winner
Naturally Fresh Walnut
Naturally Fresh Walnut is the strongest all-around pick in this comparison for natural clumping without corn.
Lowest daily cost
Naturally Fresh Walnut at $0.54/day
Budget is often the deciding factor in this tier.
Best odor control
Naturally Fresh Walnut at Strong natural absorption
Odor control often decides whether a litter feels tolerable long term.
Tracks less outside the box
World's Best Cat Litter at Minimal
Tracking can be more important than overall score in small spaces.
What we actually measured
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 pourParticulates caught in the air 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.
Why Naturally Fresh Walnut wins this matchup
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.
| Product | ||
|---|---|---|
| Overall Score | 8.8 | 9.1 |
| 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 | |
Best fit
Naturally Fresh Walnut
Naturally Fresh Walnut makes the most sense for natural clumping without corn.
Worth it if
You want a walnut-shell litter that clumps harder than many natural competitors and absorbs odor naturally without added fragrance.
Skip it if
You need a formula that solves natural clumping without corn better.
Best fit
World's Best Cat Litter
World's Best Cat Litter makes the most sense for eco-conscious owners who want flushable litter.
Worth it if
You want eco-friendly and flushable litter with very good daily usability.
Skip it if
You're on a tight budget or want the absolute lowest dust numbers.
If neither option is quite right
The closest litters we have tested to this matchup, on score and on price.
Silica Crystal
PrettyLitter
Runs at $0.80 a day. Its dust was never weighed.
Best for health monitoring and lightweight convenience
Soft Wood / Pine
Catalyst Soft Wood
Weighed 0.15mg per pour and runs at $0.72 a day.
Best for cats that reject pellets
Clumping Clay
Dr. Elsey's Ultra
Weighed 0.03mg per pour and runs at $0.51 a day.
Best for dust-sensitive homes
Read the full reviews
Use this page to choose a winner quickly, then open the full product reviews if you want the long-form test notes.
Keep comparing nearby options
Related matchups that share one of the same products and answer the next likely decision.
Related matchup
Dr. Elsey's Ultra vs World's Best Cat Litter
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.
Winner: Dr. Elsey's Ultra
Related matchup
Dr. Elsey's Ultra vs Naturally Fresh Walnut
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.
Winner: Dr. Elsey's Ultra
Related matchup
Arm & Hammer Clump & Seal vs World's Best Cat Litter
Clump & Seal is the cheap perfumed clay. World's Best is the flushable corn litter with no added scent.
Winner: World's Best Cat Litter
Related matchup
Arm & Hammer Clump & Seal vs Naturally Fresh Walnut
Naturally Fresh is the way out of fragrance and heavy dust without paying premium clay money.
Winner: Naturally Fresh Walnut
Related matchup
World's Best Cat Litter vs Sustainably Yours
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.
Winner: Sustainably Yours
Related matchup
Naturally Fresh Walnut vs Sustainably Yours
Naturally Fresh is the cheaper natural bag and clumps nearly as hard. Sustainably Yours flushes and tracks less.
Winner: Sustainably Yours
Quick Answers
Which is better: Naturally Fresh Walnut or World's Best Cat Litter?
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.
Which is cheaper per day: Naturally Fresh Walnut or World's Best Cat Litter?
Naturally Fresh Walnut runs at $0.54 a day against $0.58 for World's Best Cat Litter.
Which controls smell better: Naturally Fresh Walnut or World's Best Cat Litter?
Naturally Fresh Walnut scored higher: strong natural absorption, against good with daily scooping for World's Best Cat Litter.
Which tracks less outside the litter box: Naturally Fresh Walnut or World's Best Cat Litter?
World's Best Cat Litter keeps more litter in the box: minimal, against moderate for Naturally Fresh Walnut.