Quick answer: Most cats prefer unscented clumping litter with a fine, sand-like texture, and it is easier to keep clean because you can scoop out urine every day. Non-clumping litter tracks less and can work for cats who already like it, but it needs full changes more often. If you switch, do it gradually and let your cat choose.
Walk down any pet store aisle and you will find a wall of litter options: clumping clay, non-clumping clay, crystals, paper, pine, corn and wheat. The biggest choice for most owners comes down to one question: clumping or non-clumping? The right answer matters more than it seems, because litter your cat dislikes can lead to accidents around the house. This guide compares the two types side by side, explains what research says cats actually prefer and shows you how to switch litter without upsetting your cat.
What is the difference between clumping and non-clumping litter?
Clumping litter forms solid clumps when it gets wet, so you can scoop out urine and feces and leave the clean litter behind. Many clumping clay litters are made from sodium bentonite, a clay made from volcanic ash, as dvm360 explains. Some plant-based litters also clump.
Non-clumping litter absorbs urine into the granules instead of forming firm clumps. You can scoop solid waste, but the wet litter stays mixed into the box, so the whole box needs to be emptied and refilled more often. Traditional non-clumping clay, recycled paper pellets and many wood pellets fall into this group. Silica crystal litter is another non-clumping option; it absorbs moisture into the crystals.
Clumping vs non-clumping cat litter at a glance
| Feature | Clumping litter | Non-clumping litter |
|---|---|---|
| How it handles urine | Forms solid clumps you scoop out | Absorbs urine into the granules |
| Daily care | Scoop clumps and solid waste | Scoop solid waste; wet litter stays in the box |
| Full litter changes | Less often if scooped daily | More often, since urine stays in the box |
| Texture | Usually fine and sand-like | Often larger pellets or coarser granules |
| Cat preference in studies | Generally preferred | Generally less preferred |
| Monitoring urine output | Easier: clump size and number are visible | Harder to judge |
| Tracking | Fine granules can track more | Larger pellets often track less |
| Typical materials | Bentonite clay, some corn, wheat or grass blends | Plain clay, paper, wood pellets, silica crystals |
What do cats actually prefer?
This is the most important question, because your cat is the one using the box. The evidence leans clearly toward clumping litter:
- According to dvm360, a study in the early 1990s found that cats strongly preferred finely granular, sand-like material (clumping or scoopable litter) over large-granule litter such as plain clay or recycled paper. When silica crystal litters arrived, later comparisons still found a preference for clumping litter.
- The ASPCA says most cats prefer clumping, unscented litter with a medium to fine texture.
- VCA Animal Hospitals lists fine clay, clumping-style litter as what most cats prefer.
- The AAHA/AAFP Feline Life Stage Guidelines note that unscented clumping litter may be preferred for cats with a history of urinary problems.
The likely reason is simple: fine, soft granules feel more like the loose sand and soil cats naturally dig in. That said, every cat is an individual. The ASPCA notes that cats often develop a preference for the litter type they used as kittens, and some cats adapt to a change easily while others do not.
Pros and cons of each type
Clumping litter: pros
- Most cats like the feel of it.
- Removing urine clumps every day keeps the box fresher between full changes.
- You can see changes in clump size or number, which may be an early clue that your cat is urinating more or less than usual. Changes in urination are worth reporting to your veterinarian.
Clumping litter: cons
- Fine granules can track out of the box and stick to paws.
- Some clay products can be dusty. dvm360 notes that the best litters combine a texture cats like with strong odor control and minimal dust.
- Clay clumping litter is heavy to carry.
Non-clumping litter: pros
- Larger pellets often track less around the house.
- Some non-clumping options are made from recycled paper or wood, which appeals to some owners.
Non-clumping litter: cons
- Urine stays in the box, so odor can build up faster unless you change it often.
- Many cats prefer a finer texture, so a cat used to clumping litter may reject coarse pellets.
- It is harder to notice changes in how much your cat is urinating.
Scented or unscented?
Most experts lean toward unscented litter. The ASPCA recommends using unscented litter, and AAHA/AAFP note that unscented clumping litter may be preferred for cats with urinary history. dvm360 explains that the effect of fragrance on litter preference is unclear: one study linked scented litter to elimination problems while another did not. Since cats have a far more sensitive sense of smell than we do, starting with unscented litter and keeping the box clean is the safer choice. Daily scooping does more for odor than any fragrance can.
Litter depth and box size
Guidance on depth varies. The ASPCA says cats usually prefer one to two inches of litter, while VCA lists a deep box with at least three inches of digging material among what most cats prefer. Because recommendations differ, watch your cat: if they balance on the edge or barely dig, try a different depth.
Box size matters too. AAHA/AAFP recommend a box at least 1.5 times the length of your cat from nose to base of tail, and boxes with low sides for kittens and seniors. The ASPCA notes that most cats prefer large boxes they can enter easily, and dvm360 describes a study in which cats trended toward using larger boxes over medium and small ones. AAHA/AAFP also recommend one box per cat plus one extra.
How to keep each type clean
- Clumping: Scoop every day. VCA recommends emptying all litter weekly and scrubbing the box with hot water and mild soap monthly (some cats prefer this weekly).
- Non-clumping: Remove solid waste daily and replace the litter more often, since urine is absorbed rather than removed.
- Both: Avoid strong-smelling chemicals. AAHA/AAFP advise against soap or strong chemicals, and the ASPCA suggests unscented soap, baking soda or no soap, since a cat may develop an aversion to scented cleaners.
For a full routine, read our guide on how often to clean the litter box.
How to switch litter without accidents
- Offer a choice first. Both the ASPCA and VCA suggest a “litter box cafeteria”: place boxes side by side, each with a different litter, and see which one your cat uses most.
- Change gradually. If you need to switch, mix a small amount of the new litter into the old and increase the proportion over time, watching for signs of avoidance.
- Keep everything else the same. Change only one thing at a time: litter type, box style or location.
- Watch for warning signs. Sniffing and walking away, perching on the rim, or going next to the box can mean your cat dislikes the change. If accidents begin, go back to the old litter.
If your cat is already going outside the box, rule out medical causes with your veterinarian first, then see our guide on why cats pee outside the litter box.
So which should you choose?
For most cats, an unscented clumping litter with a fine, sand-like texture is the best place to start. It matches what research says cats prefer and makes daily cleaning easier. Non-clumping litter can still be the right fit for a cat who already uses it happily, or when your veterinarian recommends it. Whatever you choose, keep it clean and let your cat’s behavior guide you.
A comfortable home goes beyond the litter box. Give your cat a cozy place to rest away from the bathroom area, such as the Cozy Enclosed Cat Bed or a soft Teddy Fleece Cat Pad, or browse all CozeCats products.
Give your cat a cozy spot away from the litter box
Most cats prefer resting spots kept well away from their litter area. The Teddy Fleece Cat Pad adds a soft, warm place to nap anywhere in your home.
Frequently asked questions
Is clumping or non-clumping litter better for cats?
For most cats, clumping litter. Studies summarized by dvm360 found cats prefer fine, sand-like clumping litter, and the ASPCA says most cats prefer clumping, unscented litter.
Is non-clumping litter better for kittens?
Some owners choose non-clumping litter for very young kittens. Ask your veterinarian what they recommend for your kitten, and keep in mind that cats often prefer the litter they used as kittens later in life.
How deep should cat litter be?
Advice varies. The ASPCA says cats usually prefer one to two inches, while VCA lists at least three inches of digging material. Adjust based on how your cat digs and covers.
Does scented litter help with odor?
Not reliably. Fragrance can bother some cats, and dvm360 says its effect on preference is unclear. Unscented litter plus daily scooping is the safer approach.
How do I switch my cat to a new litter?
Offer the new litter in a separate box beside the old one, or mix it in gradually. Change one thing at a time and go back to the old litter if accidents start.
Keep reading
- How often should you clean the litter box?
- Why is my cat peeing outside the litter box?
- Bringing a new cat home: first week guide
- Signs of stress in cats
Sources
- dvm360: The latest scoop on litter
- ASPCA: Litter Box Problems
- VCA Animal Hospitals: Litter Box Training
- AAHA/AAFP Feline Life Stage Guidelines: General Litter Box Considerations
This article is general information, not veterinary advice. If you are worried about your cat’s health, contact your veterinarian.
