Why Is My Cat Toileting Outside the Litter Tray?

Understanding House-Soiling, Litter Tray Avoidance and Correct Cleaning

Finding urine or faeces outside the litter tray can be upsetting and frustrating. However, cats do not toilet around the home out of spite, revenge or stubbornness. House-soiling is communication. It tells us that something about the cat’s health, environment, emotional wellbeing or toileting arrangements is not working for them.

The sooner the problem is investigated, the easier it is usually to resolve. Repeated toileting in the same place can gradually become an established preference, particularly if residual odour remains within carpet, flooring, bedding or furniture.

Successful treatment therefore involves three connected steps:

Rule out pain or illness.
identify and correct the underlying behavioural or environmental cause.
Thoroughly remove the remaining scent from previously soiled areas.

Cleaning is important, but it is only one part of the solution.

Start With a Veterinary Examination

A sudden change in toileting behaviour should always be treated as a potential medical problem first—even when the cat otherwise appears well.

Urinary inflammation, bladder stones, infection, kidney disease, diabetes and other conditions can cause pain, urgency, increased urine production or difficulty reaching the litter tray in time. Constipation, diarrhoea, digestive discomfort, arthritis, reduced mobility and age-related cognitive changes can also affect toileting behaviour.

A cat experiencing pain while urinating may begin to associate the litter tray with that discomfort. Even after the original medical condition improves, the cat may continue avoiding the tray because it has become connected with an unpleasant experience.

Urinary blockage is an emergency

Seek immediate veterinary attention if your cat is:

repeatedly entering the litter tray but producing little or no urine;
straining or crying while attempting to urinate;
licking the genital area excessively;
restless, hiding or appearing distressed;
passing only small drops of urine;
vomiting, becoming weak or refusing food.

An inability to pass urine may indicate a urinary obstruction. This is particularly common in male cats and can become fatal without urgent treatment.

Toileting or Urine Marking?

Before creating a behaviour plan, it is important to distinguish ordinary toileting from urine marking.

Toileting outside the tray

A cat that is emptying its bladder will usually:

squat;
pass a noticeable volume of urine;
choose a horizontal surface;
attempt to scratch or cover the area;
use carpet, bedding, clothing, bathmats, floors or furniture.

This pattern is more commonly associated with illness, litter tray aversion, access problems or a preference for a different surface or location.

Urine marking or spraying

A cat that is spraying will usually:

remain standing;
reverse towards a vertical surface;
raise and sometimes quiver the tail;
tread with the back feet;
release a relatively small quantity of urine.

Spraying may occur in response to territorial concerns, unfamiliar cats, household tension, environmental change, frustration or anxiety. Desexed males and females can both spray, although it is more common in undesexed cats.

The distinction matters because spraying and litter tray avoidance often require different behavioural interventions.

Why Cats Stop Using the Litter Tray

There is rarely one universal explanation. Several factors may operate at the same time.

The tray is too small

A cat should be able to enter, turn around, dig, squat and leave without feeling cramped. A practical guideline is to provide a tray approximately one-and-a-half times the cat’s body length from nose to the base of the tail.

Many standard commercial trays are too small for adult cats. Large, modified plastic storage containers can sometimes provide a more suitable alternative.

The tray is difficult to enter

Kittens, elderly cats, cats recovering from illness and those with arthritis or mobility limitations may struggle with high-sided trays.

A low-entry tray can make an enormous difference. A cat should not have to climb, jump or balance simply to access its toilet.

The tray is covered

Some cats happily use covered trays, but others find them cramped or threatening. Covers can retain odour and may prevent a cat from seeing another animal approaching.

In a multi-cat household, a covered tray with only one entrance can create an ambush point. An open tray allows a clearer view and more confidence while toileting.

The litter is unsuitable

Cats can have strong preferences regarding litter texture, smell and depth. Many prefer a soft, fine-textured and unscented litter.

A sudden change in litter type can trigger avoidance, even when the new litter seems better to the owner. Change litter gradually by mixing increasing quantities of the new product with the familiar litter.

Some cats prefer paper, wood, clay, tofu or another substrate. The best litter is ultimately the one the individual cat will use consistently.

The tray is not clean enough

Cats have an extremely sensitive sense of smell. A tray that appears acceptable to us may already be unpleasant to the cat.

Remove urine clumps and faeces at least daily. In a busy multi-cat household, trays may need to be scooped several times each day.

Completely empty and clean trays regularly using a gentle, cat-safe detergent. Rinse thoroughly and dry before adding fresh litter. Strong deodorising products and heavily fragranced cleaners can discourage some cats from using the tray.

There are not enough trays

A widely used starting point is:

One litter tray for each cat, plus one additional tray.

A single cat should therefore ideally have access to two toileting locations.

However, the number alone is not enough. Trays placed directly beside one another may effectively function as one toileting station. Position trays in separate areas so that one cat cannot guard or block access to all of them.

The location feels unsafe

Choose locations that are:

quiet;
private without being enclosed;
easily accessible at all times;
away from food and water;
away from washing machines, dryers and other sudden noises;
somewhere the cat cannot be cornered by another animal.

Avoid placing every tray in one room. A nervous cat may be unwilling to cross another cat’s territory to reach it.

Another cat is controlling access

Feline conflict is often subtle. There may be no obvious fighting.

One cat may stare at another, sit in a doorway, follow them, wait outside the tray or block a hallway. The less confident cat may decide that toileting elsewhere is safer than approaching the litter tray.

Multiple trays, separate feeding stations, vertical resting areas, hiding places and carefully managed introductions may be required.

The cat has developed a surface preference

Cats sometimes begin preferring carpet, towels, laundry, bedding, soil or smooth flooring.

This can begin after an urgent or painful episode when the cat could not reach the tray. The new surface then becomes familiar and may feel more comfortable than the existing litter.

A temporary tray can be placed at the preferred location. Once the cat uses it reliably, move it only a small distance at a time towards a more suitable position. Moving it too far or too quickly may cause the problem to return.

Why Correct Cleaning Matters

A previously soiled area may continue to smell clean to us while still carrying information detectable by the cat.

Urine residue can penetrate:

carpet fibres;
carpet underlay;
grout;
timber joins;
mattresses;
fabric lounges;
bedding;
skirting boards;
cracks beneath flooring.

Simply masking the smell with perfume does not necessarily remove the underlying residue. If the cat can still detect the location, it may continue to recognise it as a toileting or marking site.

Veterinary behaviour guidance recommends neutralising rather than merely deodorising urine odour. Products containing ammonia or vinegar should be avoided because their odours may resemble or intensify urine-related smells and may also be irritating.

Using TrueEco to Clean Pet Accidents

At Born Bold Cats and The Smart Cat Society, we use TrueEco as part of our approach to cleaning pet-related accidents.

TrueEco Dog & Cat Surface Cleaner is marketed as a pet-safe, pH-neutral, enzyme-based stain and odour product. The manufacturer lists water, fragrance, a plant-based alkyl polyglycoside and a bacterial-spore blend containing Bacillus strains among its ingredients. It is promoted for use on surfaces including carpet, couches, tiles and artificial grass.

The aim is not simply to cover the smell with a stronger fragrance. The cleaner is intended to break down organic residues contributing to persistent pet odours.

TrueEco can be useful for:

urine accidents;
faecal residue;
vomit;
washable pet bedding;
floors and tiled areas;
carpet and upholstery;
artificial grass and outdoor pet areas.

Always follow the current instructions printed on the product being used, because directions and dilution rates may differ between ready-to-use products and concentrates.

How to clean a fresh urine accident

1. Blot immediately

Use absorbent paper towel or a clean cloth to lift as much liquid as possible.

Press firmly rather than scrubbing. Scrubbing can spread the urine and force it deeper into carpet or upholstery.

2. Check how deeply the urine has penetrated

A small visible patch on the surface may have spread much further underneath.

On carpet, check whether the liquid has reached the underlay. Surface spraying alone may not resolve an odour that is sitting deeper in the material.

3. Test the cleaner first

Before treating carpet, upholstery, timber or another delicate surface, test the product on a small hidden area.

Follow the manufacturer’s directions regarding suitability, dilution and contact time.

4. Treat the full affected area

Apply the product to the complete contaminated area—not only the most visible part of the stain.

Where urine has soaked deeply, the cleaner must reach the same depth as the contamination to treat the underlying residue effectively.

5. Allow the area to dry properly

Prevent the cat from accessing the area while it is wet. Provide ventilation and allow the surface to dry according to the label instructions.

Because the TrueEco product contains fragrance, cautious use and good ventilation are sensible around cats that are particularly sensitive to smells.

6. Reassess after drying

Once fully dry, check for remaining odour. Older or repeated accidents may require further treatment, particularly if urine has entered carpet underlay, porous timber, grout or soft furnishings.

Severely contaminated carpet underlay may occasionally need professional treatment or replacement.

Cleaning faeces or vomit

Remove solid material first using disposable paper towel or a scoop.

Blot any remaining liquid, then clean the affected area according to the TrueEco label. Avoid rubbing the material further into fabric or carpet.

Wash hands thoroughly and prevent other animals from entering the area until it has been cleaned and dried.

Cleaning the Litter Tray Itself

The litter tray should smell neutral—not strongly perfumed.

For routine tray cleaning:

Empty the used litter.
Wash the tray with warm water and a mild cat-safe detergent.
Rinse thoroughly.
Dry completely.
Add fresh litter.

Some cats avoid trays that retain disinfectant, perfume or deodoriser smells. TrueEco is especially valuable for cleaning accident sites around the home, but any cleaner used directly inside a litter tray should be used according to its label and rinsed well if required.

Replace trays that have become deeply scratched, cracked or permanently odorous. Scratches in plastic can retain residue and make complete cleaning more difficult.

What Not to Do

Never punish a cat for toileting outside the tray.

Do not:

yell;
chase the cat;
spray it with water;
push its face towards the accident;
carry it angrily to the litter tray;
confine it beside the mess as punishment.

Punishment does not teach the cat where it should toilet. It increases fear and may cause the cat to hide its toileting behaviour or avoid toileting when people are nearby. Anxiety can also worsen house-soiling and urine marking.

Clean the area calmly and concentrate on identifying why the behaviour occurred.

Preventing a Return to the Same Location

After the area is completely clean and dry, it may help to change its meaning.

Depending on the location, consider placing:

a food bowl;
treats;
a bed;
a scratching post;
a play station;
a piece of furniture;
a temporary litter tray.

Cats generally prefer to keep feeding, resting and toileting areas separate. Turning the location into a positive living space can help disrupt the established pattern.

Restricting access temporarily may also help, but it must be combined with providing an acceptable toileting option elsewhere.

Keep a Toileting Diary

Record:

the date and time;
urine, faeces or spraying;
the exact location;
the type of surface;
which cat was responsible;
litter tray condition;
recent household changes;
interactions with other pets;
changes in food, medication or routine;
signs of discomfort or increased thirst.

Patterns often become much clearer when written down. A video camera can also help identify which cat is involved and whether another cat is guarding the litter tray.

When to Seek Behaviour Support

Professional behavioural support is recommended when:

your veterinarian has ruled out or treated medical causes;
the behaviour is recurring;
more than one cat may be involved;
there is tension within the household;
the cat appears anxious or fearful;
several tray changes have already been attempted;
the cat has developed a strong location or surface preference;
the problem began after illness, hospitalisation, medication or another stressful event;
you are unsure whether the behaviour is spraying or toileting.

A feline behaviour consultation examines the whole picture, including health history, litter tray arrangement, household relationships, routine, environmental resources and the sequence of events surrounding each accident.

There is rarely a single miracle product or immediate fix. The most effective plans combine veterinary care where required, improved litter tray facilities, stress reduction, environmental management and thorough odour removal.

Your Cat Is Not Being Naughty

Toileting outside the litter tray is a symptom—not a character flaw.

Your cat may be in pain, frightened, overwhelmed, unable to access the tray or communicating that the current toileting arrangement does not meet their needs.

Approach the problem with patience and curiosity. Rule out illness, improve the environment, clean every accident correctly and avoid punishment.

Once we understand what the cat is communicating, we can begin creating a solution that works for both the cat and the people who love them.

About the Author

Written by Jane Cockerton

BSc (Hons) Biological Science
Diploma in Feline Behaviour Science and Technology
Certificate in Cat Psychology and Training

Founder of Born Bold Cats and The Smart Cat Society, Jane Cockerton is an Australian feline behaviour specialist, qualified animal trainer and award-winning Sphynx and Elf cat breeder. She combines scientific knowledge with extensive hands-on experience in feline behaviour, training, kitten development and responsible breeding. Her work focuses on helping cat owners better understand feline behaviour through practical, evidence-based education and positive reinforcement training.

Educational Disclaimer

The information in this article is intended for general educational purposes only and should not be considered a substitute for professional veterinary diagnosis, treatment or individual behavioural assessment. Every cat is unique. If your cat is unwell, showing signs of pain, or displaying significant behavioural changes, seek advice from your veterinarian or a qualified feline behaviour professional.