Litter box problems: why cats go outside the box and what actually helps

TUREFF• •0

A cat that starts urinating or soiling outside the litter tray is one of the most common reasons owners seek help, and one of the most frustrating. The good news is that there is almost always a reason, and many cases improve once that reason is found. Punishment never helps; it adds stress and usually makes the problem worse.

Step one: rule out a medical cause

Before changing anything at home, book a vet appointment. Toileting problems are often linked to health issues such as:

Cystitis and other urinary tract conditions, which can make a cat feel an urgent need to go or associate the tray with pain.
Kidney disease, diabetes or an overactive thyroid, which can increase thirst and the amount of urine.
Arthritis and joint pain, making high-sided trays or stairs hard to manage, particularly in older cats.
Constipation or diarrhoea.

A cat, especially a male, that strains in the tray and passes little or no urine is an emergency. A blocked urethra can become life-threatening quickly, so contact a vet immediately, even out of hours.

Step two: look at the tray itself

Many problems come down to the tray not suiting the cat.

Number of trays. The usual guidance from welfare charities is one per cat plus one, in separate locations, so no cat has to queue or pass a rival.
Size. The tray should be big enough for the cat to turn around comfortably. Many standard trays are too small for adult cats; a large plastic storage box can work well.
Covered or open. Some cats like a hood for privacy; others feel trapped and dislike the trapped smell. Try offering both.
Litter type. Most cats prefer a fine, soft, unscented, clumping litter. Sudden changes of brand or texture can put a cat off.
Depth. Enough litter to dig and bury, but not so much it feels unstable.
Cleanliness. Scoop at least once or twice a day and wash the tray regularly with hot water and a mild, unscented cleaner. Strong-smelling disinfectants can deter cats.

Step three: check the location

Quiet and private, away from busy walkways, noisy washing machines and the cat flap.
Away from food and water. Cats do not like to toilet near where they eat.
Easy to reach, especially for older cats. Avoid making a cat climb stairs or cross a room where another pet waits.
Not in a corner with only one exit if there are other cats in the house.

Step four: consider stress

Cats are sensitive to change. Common triggers include a new pet or baby, building work, moving furniture, visitors, tension between cats in the house and neighbourhood cats seen through the window. Signs that stress may be involved include spraying on vertical surfaces, marking near doors and windows, and over-grooming. Things that can help:

Give each cat separate resources: food, water, beds, scratching posts and trays in different areas.
Provide hiding places and high perches so cats can avoid one another.
Block the view of outdoor cats at ground-floor windows if they trigger marking.
Keep routines predictable, with regular feeding times and play.

Cleaning up accidents properly

If a spot still smells of urine to a cat, it can become a toilet again.

Blot up as much as possible with kitchen paper.
Clean with an enzyme-based cleaner designed for pet urine, or a warm solution of biological washing powder followed by rinsing, testing on a hidden patch first.
Avoid ammonia-based cleaners, as urine contains ammonia and the smell may draw the cat back.
Make the area less inviting once dry, for example by placing a food bowl or bed there for a while, or temporarily restricting access.

Be patient and keep notes

Record when and where accidents happen, which cats are involved and anything that changed around that time. Patterns often point to the cause. If the problem continues after your vet has ruled out illness, ask for a referral to a qualified feline behaviourist. Have you solved a litter tray problem? Share what worked for your cat in the comments.