Litter & Litter Tech
How to Switch Cat Litter
Litter texture is one of the strongest preferences a cat has. Change it overnight and a percentage of cats simply decline.
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Everyone in this category says they tested twenty litter boxes. We have not tested any, and we say so. What we do instead: compile the published specs, read the manuals, and do the arithmetic on what this gear costs to run and how it behaves once there is more than one cat using it. Every spec is linked to the document it came from. Prices are checked daily — last verified November 12, 2026. Here is exactly how we pick.
Litter is the one purchase in this hub the cat has a strong opinion about, and the opinion is about texture rather than brand.
Why the slow method is the fast method
The Ohio State Indoor Pet Initiative reports that most cats prefer fine-grained, unscented litter and that many are deterred by scented or deodorant products. That preference is set early and is remarkably stable, which is why an abrupt swap is the most common cause of a cat going just outside the box.
A refused box is expensive: cleaning, an enzyme treatment, and a cat that now associates the box with something unpleasant. Two weeks of gradual mixing avoids all of that.
The two methods
Gradual mix. Days 1-3: 25 percent new. Days 4-7: 50 percent. Days 8-10: 75 percent. Then all new. Hold at any stage the cat hesitates, and drop back a step if it skips the box once.
Two-box test. Put the new litter in a second identical box beside the old one. The cat votes with its feet within a few days, and you have learned something no amount of mixing tells you.
The two-box test is better when you are choosing between litters. The gradual mix is better when the decision is already made -- a discontinued product, a dust problem, a move to something lighter to carry.
Which litters cats take to most readily
Dr. Elsey’s Clean Tracks is a soft landing for a switch, because it is 100 percent bentonite at a published medium grain — the texture a cat moving from any ordinary clay litter already knows. It does not publish a scent status, so if the cat is one of the many the published guidance says are deterred by fragrance, the litters on our unscented roundup state that outright and this one does not.
World’s Best is a bigger step -- corn granules feel different underfoot than clay -- but it is unscented and clumps quickly, and at 15 lb the bag is far lighter to carry than clay’s 40 lb, which is the reason most people try it. Expect to need the full two weeks.
Tofu litter is the biggest texture change we recommend attempting: soybean pellets, 58 percent lighter than clay, flushable on the maker’s own third-party testing. Some cats take to it immediately and some never do, which is exactly the case for running the two-box test rather than committing a whole box to it.
When a switch fails
- Go back to the old litter immediately. Re-establish the habit first; you can try again in a month.
- Clean the accident properly with an enzyme cleaner, or the spot itself becomes the reason it keeps happening. Our enzyme cleaner page covers method.
- Check nothing else changed -- a moved box, a new deodorizer, a different depth. Two inches is the published guidance.
- If the cat is still avoiding the box after a return to the old litter, that is a vet conversation, not a litter one. The Cornell Feline Health Center lists urinating outside the box among the signs of lower urinary tract disease.
The gear discussed here
Specs are the manufacturer's own, linked to the page they came from. Prices come from a live daily check; where we have no verified price we say so rather than print a stale one.
Dr. Elsey's Clean Tracks Clumping Clay Litter
Dr. Elsey's · Cat litter · Our score 8.4/10
#ad Price as of November 12, 2026. Prices move; we check daily. How we're funded.
100 percent bentonite in a hard-clumping medium grain, and the only litter here whose maker ties its low-tracking claim to that same published grain size rather than to a brand word.
Published specs
| Material | 100 percent bentonite clay (published) |
|---|---|
| Grain | Medium grain, published as the mechanism for both clumping and tracking |
| Clumping | Hard clumping; maker states clumps that will not break down |
| Tracking | Low tracking, attributed to the medium grain |
| Dust | Low dust and hypoallergenic; no percentage published |
| Odor | Superior odor control, stated for single or multi-cat |
| Bag size | 40 lb |
| Scent status | Not published on this listing |
| Guarantee | Guaranteed litter box use |
Most litters claim hard clumping and low tracking as two separate features. Dr. Elsey's attributes both to the same thing: a medium grain. A larger granule holds together under a scoop and is too heavy to ride far on a paw; a fine one does the opposite on both counts. That is the rare case of a maker publishing the MECHANISM rather than the outcome, and it is why this litter is our pick for a grooved top-entry lid, where fine grain is exactly what gets carried out.
What the specs favor
- Publishes a grain size, which most of this category will not
- Ties its low-tracking claim to that grain rather than to a brand word
- Hard clumping, so waste leaves the box intact and an automatic box's rake does not shatter it
- 100 percent bentonite, published
- Low dust and hypoallergenic, both published
What they don't
- Does not publish a dust percentage, where the retired Ultra published 99.9 percent
- Does not publish a scent status at all, where the retired Ultra named itself unscented
- Clay, so it is heavy to carry and heavy to lift out
- 40 lb bag is awkward to store in a flat
- No published test method behind any of the claims
You specifically need a litter whose listing states it is unscented, or you want the most specific published dust figure. This one publishes neither any more -- our unscented roundup ranks the litters that do.
How it scores
Scores are our editorial weighting of the published specs above, not a test result. They are deliberately kept out of this page's structured data.
World's Best Cat Litter Multiple Cat, Unscented, 15 lb
World's Best Cat Litter · Cat litter · Our score 8.0/10
#ad Price as of November 12, 2026. Prices move; we check daily. How we're funded.
Whole-kernel corn rather than clay, unscented, and the heaviest bag you can now buy is 15 lb against the clay's 40 -- but it is about 2.2x the price per pound, and the maker's 2x-longer claim does not quite cover that.
Published specs
| Material | Whole-kernel corn |
|---|---|
| Scent | Unscented; maker states no artificial perfumes |
| Bag sizes sold | 15 lb and 8 lb (the 28 lb and 32 lb bags are other formulas) |
| Dust | 99 percent dust free, stated naturally free of silica dust |
| Formulation | Multi-cat |
| Clumping | Quick clumping; maker states no chiseling or scraping |
| Maker's longevity claim | "Lasts 2x longer" -- no test method published |
| Tracking | Maker states low tracking; no test published |
| Flushable | Stated by the maker |
| Bag dimensions | 6" x 11" x 14" |
| Model | 62100615 |
Live Amazon prices, 2026-11-12. This 15 lb bag at $19.15 is $1.28 a pound ($19.15 / 15); the 8 lb bag at $10.45 is $1.31, so the smaller bag is barely a penalty. Dr. Elsey's Clean Tracks clay at $22.99 for 40 lb is $0.57 a pound ($22.99 / 40). So the corn costs about 2.2 times per pound what the clay does. The maker's defense of that is printed in its own listing title -- "lasts 2x longer" -- and no test method is published behind it anywhere. Grant the claim in full anyway and the corn is still dearer: $1.28 halved is $0.64 a pound of use against the clay's $0.57, about 11 percent more. So the honest case for this litter is the lighter bag and the unscented plant substrate, not a saving.
What the specs favor
- Unscented, matching the documented preference, with no artificial perfumes stated
- The heaviest bag sold is 15 lb against 40 lb for the clay -- a real difference if litter goes upstairs
- 99 percent dust free is a published figure, where the clay on these pages publishes no percentage at all
- Quick clumping, with the maker stating it needs no chiseling or scraping
- Whole-kernel corn with no clay dust, and the maker states it is flushable
What they don't
- The big bags in this formula are discontinued -- only 15 lb and 8 lb are live, so a multi-cat house re-orders more often
- About 2.2x the clay's price per pound, and still roughly 11 percent dearer even if the 2x-longer claim is granted in full
- The "lasts 2x longer" claim has no published test method behind it
- Lighter granules travel further than clay whatever the listing says; the maker claims low tracking and publishes no test either way
- Corn attracts pantry pests if the bag is left open in a warm room
Tracking is already your worst problem, or you buy litter on price per pound. Lighter granules travel further whatever the listing claims, and this is a lighter granule than any clay on these pages.
How it scores
Scores are our editorial weighting of the published specs above, not a test result. They are deliberately kept out of this page's structured data.
Tuft & Paw Really Great Cat Litter
Tuft & Paw · Tofu litter · Our score 8.0/10
#ad Price as of November 12, 2026. Prices move; we check daily. How we're funded.
The only substrate here with a published third-party flushability test and a published duration figure, which together make it the most checkable claim set in the category.
Published specs
| Material | Soybean-based (tofu) pellets |
|---|---|
| Bag size | 9.25 lb |
| Published duration | Up to 40 days for a single cat |
| Weight | 58 percent lighter than traditional clay litter |
| Dust | 99 percent dust-free |
| Flushable | Yes -- third-party tested, breaks down in water |
| Clumping | Yes |
| Scent options | Unscented charcoal, lightly scented lavender |
Tuft & Paw publishes up to 40 days per 9.25 lb bag for one cat. 365 / 40 = 9.1 bags a year, or about 84 lb of litter carried home. A clay household at our own scoop arithmetic goes through roughly a 20 lb bag every three to four weeks -- around 280 lb a year. The weight difference is the argument, and it is theirs, not ours.
What the specs favor
- Publishes a duration figure per bag, which very few litters do
- Third-party tested for flushability, stated as such rather than implied
- 58 percent lighter than clay on the maker's own figure
- Clumps, so the daily routine is unchanged from clay
What they don't
- Premium price per pound -- the most expensive substrate on this page
- Flushing cat waste is prohibited or discouraged in many municipalities regardless of the litter
- Published duration is for one cat, and multi-cat households will not see 40 days
- Pellets are large, which some cats dislike underfoot
Your local water authority discourages flushing pet waste, which many do. Without flushing you are paying a premium for weight savings alone, and wheat or corn gets you most of that for less.
How it scores
Scores are our editorial weighting of the published specs above, not a test result. They are deliberately kept out of this page's structured data.
Common questions
How long does it take to switch cat litter?
How do I transition to a new litter?
Why won't my cat use the new litter?
Can I just put out two boxes with different litters?
Should I change litter and litter box at the same time?
Sources
- Amazon listing -- Dr. Elsey's Clean Tracks Clumping Clay Cat Litter, 40 lb Bag, model 3017 (published as 100% bentonite clay with a premium texture and granule size for maximum clumping, hard clumping medium grain stated to stop moisture reaching the bottom of the tray and to form clumps that will not break down, low tracking attributed to the same medium grain, low dust and hypoallergenic, superior odor control stated for single or multi-cat households, 40 lb, guaranteed litter box use; no dust percentage and no scent status published)
- Amazon listing -- World's Best Cat Litter, Multiple Cat, Unscented, Odor Control, 15 lb Bag, model 62100615 (whole-kernel corn, 99 percent dust free and stated naturally free of silica dust, quick clumping stated to need no chiseling or scraping, low tracking and flushable both stated, "lasts 2x longer" stated in the listing title with no test method published, no artificial perfumes and no clay dust, made in the USA, bag 6 x 11 x 14 in at 15 lb; also sold as an 8 lb bag -- the 28 lb and 32 lb bags this brand lists are the Comfort Care and Low Tracking formulas, not this one)
- Tuft & Paw -- Really Great Cat Litter product page (soybean pellets, 9.25 lb, up to 40 days for one cat, 58 percent lighter than clay, 99 percent dust-free, third-party flushability testing)
- Ohio State University Indoor Pet Initiative -- Litter Boxes
Read next
- Clumping vs Non-Clumping Cat Litter
An attribute-by-attribute comparison of clumping and non-clumping litter, and why multi-cat homes almost always want clumping.
- Best Unscented Cat Litter (2026)
Unscented litters compared on published dust, grain and clumping, with the published guidance on what cats prefer underfoot.
- Cat Litter Types Compared
Clay, crystal, corn, wheat, pine, paper and tofu compared on published specifications, with an honest note on which figures are comparable.
- Best Cat Litter for Multiple Cats (2026)
Why the best odor-control litter is often the wrong buy for three cats, and which specification to rank on instead.
- How Often to Clean a Litter Box
The three separate cleaning jobs a litter box needs, on three different schedules, with the litter volume arithmetic per cat.