What is urine marking?
Updated By PetymFacts checked against official sources on
Quick answer
Urine marking is using small amounts of urine as a scent message rather than to empty the bladder. Cats usually spray backwards onto upright surfaces with the tail raised and quivering; dogs lift a leg against furniture or doorways. It is commoner in unneutered animals and stressed or crowded homes. Rule out illness first, then reduce the stress behind it.
Also called spraying, cat spraying, dog marking indoors, territorial marking, leg lifting indoors.
Key facts
- A spraying cat backs up to a vertical surface, raises its hindquarters and quivering tail, and releases a small amount of urine, usually under 2 ml. International Cat Care
- Both male and female cats spray; it is commoner in males and in unneutered cats, and usually drops a lot after neutering. International Cat Care
- Around 10% of neutered male and 5% of neutered female cats spray, and the likelihood rises with the number of cats in the home. International Cat Care
- In dogs, marking is most common in unneutered males, but neutered dogs and females can also mark. Merck Veterinary Manual
- Indoor spraying by neutered cats can result from increased stress, and marking should never be punished. AAFP and ISFM (Journal of Feline Medicine and Surgery, 2013)study
Is it marking or a toilet problem?
The posture, the place and the amount usually tell you. The difference matters, because the fixes are different.
| Urine marking | Toileting outside the tray or outside | |
|---|---|---|
| Amount International Cat Care | Small squirts | A full puddle |
| Surface International Cat Care | Mostly upright: walls, curtains, doors, furniture legs | Mostly flat: floors, beds, rugs |
| Cat posture International Cat Care | Standing, backing up, tail raised and quivering | Squatting |
| Common triggers International Cat Care | Other cats or dogs, visitors, new things, outdoor cats seen through windows | Pain, illness, a dirty or unpleasant tray |
Either can have a medical cause. A urine test at the vet comes first.
Why do cats and dogs mark indoors?
Marking is a normal way for cats and dogs to leave scent messages that say who lives here and when they passed. Outdoors it helps animals share space and avoid fights. Indoors it usually means an animal feels insecure: competition with other pets for space and resources, a new baby or pet, guests, renovation, moving house, or the sight and smell of outside cats. Young unneutered cats often start spraying as they reach sexual maturity, and unneutered male dogs mark more.
In Indian flats, community cats and dogs gathering at the building gate, on the stairs or right below a balcony are a common trigger. A cat that watches them through a grille or window may spray the curtains or the wall next to it.
How do you reduce urine marking?
- See your vet first for a urine test to rule out urinary disease or kidney disease. International Cat Care
- Discuss neutering with your vet if the pet is not neutered. International Cat Care
- For cats, provide one of each resource per cat plus one: trays, bowls, beds, scratching posts and hiding places, in different spots. International Cat Care
- Block the view of outdoor cats with opaque film or card on the lower part of windows. International Cat Care
- Clean marked spots with an enzymatic cleaner or 10% biological washing powder solution, not ammonia-based products. International Cat Care
- Never punish marking; it adds stress and can increase it. AAFP and ISFM (Journal of Feline Medicine and Surgery, 2013)study
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Questions owners ask
Why has my neutered cat started spraying?
- Neutered cats can still spray, usually because something has made them feel insecure: another cat, a new person or pet, building work, or outdoor cats seen through the window. Illness can also play a part. See your vet for a urine test, then reduce the stress and add resources around the home.
Does neutering stop urine marking?
- It usually reduces it a lot, especially in cats, and marking is most common in unneutered males of both species. But around 10% of neutered male cats and 5% of neutered females still spray, so stress and household set-up matter too. Discuss the timing of neutering with your vet.
Why does my male dog lift his leg on furniture?
- Leg lifting indoors is usually marking, a scent message rather than a full bladder. It is most common in unneutered males and often follows changes such as visitors, a new dog or a move. Rule out illness with your vet, clean thoroughly, supervise, and reward toileting outside.
How do I get rid of the smell of cat spray?
- Use an enzymatic cleaner made for pet urine, or a 10% solution of biological washing powder, then rinse and dry. Avoid ammonia-based products, which smell like urine and can draw the cat back to the spot. Heavily soiled fabrics may need to be thrown away.
Keep reading
Related terms
More in behaviour
- Calming signalsCalming signals, also called appeasement or displacement behaviours, are small body-language cues such as lip or nose licking, yawning, turning the head away, blinking, sniffing the ground or lifting a paw. Dogs often show them when they feel uneasy or in conflict. Noticing them lets you give a dog space before fear escalates to growling or snapping.
- Cat scratchingCat scratching is the normal habit of dragging the claws down a surface. Cats scratch to keep their claws healthy, stretch the legs and spine, and leave scent and visible marks from glands in their paws. It should not be stopped, but it can be moved from the sofa to a well-placed, sturdy scratching post with patience and rewards.
- Destructive chewingDestructive chewing is when a dog chews things it should not, such as shoes, furniture, door frames, wires or cushions. Chewing itself is normal: puppies chew to ease teething and all dogs chew to explore. It becomes a problem through boredom, too little exercise, hunger, frustration or separation anxiety, and is fixed by redirection, not punishment.
- KneadingKneading, often called making biscuits, is when a cat rhythmically pushes its front paws into a soft surface such as a blanket, cushion or a person's lap, often purring. It starts in kittenhood, when kittens knead their mother to keep milk flowing, and many adult cats keep the habit when relaxed. It is normal and needs no treatment.
- Litter box aversionLitter box aversion is when a cat stops using its litter tray and pees or poos elsewhere in the home, because something about the tray, its place or its use has become unpleasant or frightening. Illness is a common cause, so a vet check comes first. Then fix the trays: enough of them, clean, quiet, with litter the cat likes.
- Noise phobiaNoise phobia is an intense, lasting fear of loud or sudden sounds such as fireworks, thunder or gunshots. Affected dogs tremble, pant, hide, pace, try to escape or soil indoors, and some take days to recover. It is common: about a third of dogs in one large survey were noise-sensitive. A safe den, preparation and gradual training help.
- PicaPica is eating things that are not food, such as fabric, wool, plastic, paper, rubber, stones or soil. In cats it often starts as wool or fabric sucking, especially in Oriental breeds; in dogs it can be a habit, a compulsive disorder or a sign of illness. Swallowed objects can block the gut, so a vet check comes first.
- Reactive dogA reactive dog overreacts to everyday triggers such as other dogs, strangers, bikes or autos, usually by barking, lunging, growling or pulling, most often on the lead. Fear is the most common driver, with frustration and pain also playing a part. It is managed by keeping distance from triggers and changing the dog's feelings with reward-based training, never by punishment.
- Resource guardingResource guarding is a dog protecting something it values, such as food, a chew, a toy, a bed or even a person, from people or other animals. It is normal, often fear-based behaviour, ranging from eating faster or freezing to growling and biting. It improves with management and reward-based training that teaches the dog an approaching person brings good things.
- Separation anxietySeparation anxiety is a fear response in which a dog panics when left alone or apart from the person it is attached to. Signs include howling, destruction near doors, toileting indoors, drooling and escape attempts, usually worst in the first 30 minutes. It is treated with gradual, reward-based training, sometimes alongside medicine from a vet, never with punishment.
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Sources
Each source was opened and read on the date shown. How Petym checks its sources
- International Cat Care: Urine spraying in cats (updated 26 September 2025) (opens in a new tab)
- Merck Veterinary Manual: Behavior problems in dogs (opens in a new tab)
- International Cat Care: Soiling indoors (updated 26 September 2025) (opens in a new tab)
- AAFP and ISFM (Journal of Feline Medicine and Surgery, 2013): Feline environmental needs guidelines (opens in a new tab)