My cat urinates next to its litter box: which box and litter should I choose?

If your cat is urinating next to its litter box, the first step is always to see a veterinarian, since a urinary infection, pain, or a health issue can be the cause: this behaviour should never be treated by simply changing the box or litter before ruling out a medical cause. Once the cat's health is confirmed, the box equipment and environment can then be adjusted to encourage a lasting return to good habits.

1. Why see a veterinarian first

A cat that urinates outside its litter box, even just next to it, may be suffering from a urinary infection, bladder stones, bladder inflammation, or other pain that makes using the box uncomfortable, or that it now associates with pain. In cats, urinary issues can escalate quickly and should be taken seriously, especially if you also notice frequent trips to the box, small amounts of urine, blood, or crying while trying to urinate. Only a veterinarian can make a diagnosis and suggest the right treatment. The advice below concerns equipment and environment, once a medical cause has been ruled out or treated, since an unsuitable box or litter can also contribute to or maintain the problem.

2. The box: location and model matter as much as cleanliness

Once the cat's health has been checked, several practical factors strongly influence how the box is used:

• Size: a box that is too small, where the cat cannot turn around comfortably, pushes some cats to urinate on the edge or just next to it. As a rule, the box should be noticeably longer than the cat itself.
• Number of boxes: the usual guideline is one box per cat, plus one extra, spread across different spots in the home rather than side by side.
• Location: a box placed in a noisy spot, near the washing machine, or too hard to reach for an older cat, can be enough to explain partial avoidance.
• Type of box: an open box with a rim suits cats that dislike enclosed spaces, while a covered litter house with a filter limits odours but should never be forced on a cat showing signs of reluctance to enter it.
• Rim height: a kitten or an older cat with more fragile joints sometimes needs a box with a lower entry to access it easily without hesitating every time.

3. The special case of multi-cat households

In a home with several cats, one cat may avoid a box simply because another cat occupies it often, watches it from a distance, or has already "claimed" it in the social hierarchy. Adding more boxes and spreading them across different rooms, away from busy areas and food bowls, reduces this kind of tension. Watching which cat uses which box, and when, often helps spot whether one particular cat is being pushed out by the others rather than concluding it is simply being fussy.

4. Which litter to choose

The texture and smell of the litter matter a lot to the cat, sometimes more than to its owner:

• Clumping litter: it forms clumps that are easy to scoop out daily, keeping the box clean between full cleanings. Pine-based clumping litter is a common plant-based option.
• Unscented litter: many cats are sensitive to added fragrances. An unscented litter is often better tolerated, especially after a recent product change.
• A gradual change: if you switch litters, mix the old and new ones for one to two weeks rather than a sudden switch, which can on its own trigger box avoidance.

5. Daily box maintenance

Even with the right equipment, irregular cleaning remains a common cause of avoidance:

• Remove waste at least once a day with a suitable litter scoop.
• Empty and fully wash the box every one to two weeks depending on the litter type used.
• Avoid scented cleaning products, which can leave an odour unpleasant to the cat even after rinsing.
• A litter mat placed in front of the box limits scattered litter granules without replacing regular cleaning.

6. Stress, an often underestimated factor

A move, a new pet or baby arriving, renovation work, or even a simple change of furniture near the box can unsettle a cat sensitive to stress. This factor is generally assessed by the veterinarian alongside the medical exam, since stress and urinary issues are often linked in cats rather than fully independent of each other. Keeping stable landmarks around the box, the food bowl, and resting spots often helps an anxious cat settle back into its routine more quickly after a change at home.

7. Finding the right equipment

To get back on track, browse all the boxes and litter houses in the litter boxes and houses collection, as well as litters and maintenance accessories in litter and hygiene.

Before changing any box or litter, have your cat examined by a veterinarian: it is the only way to rule out a medical cause for this behaviour.