Urine Spraying in Cats — Cat Glossary

Spraying (urine marking)

Spraying — a normal feline scent-marking behaviour in which a standing cat backs up to a vertical surface and deposits a small amount of urine, usually while treading the back feet and quivering the tail. Distinct from inappropriate urination (which involves larger volumes on horizontal surfaces). Serves communicative and territorial functions; driven by stress, inter-cat conflict, or reproductive signalling.

Why cats spray

Spraying is a form of olfactory communication — one of several ways cats deposit chemical signals for other cats to read. Urine marks contain pheromones and other chemical compounds that convey the depositor's identity, sex, reproductive status, and — arguably — emotional state. It is an entirely normal behaviour in the context of feline social structure; it becomes a problem only when it occurs inside the home.

The primary triggers are territorial pressure (typically from outdoor cats seen through windows) and social stress (conflict with other cats in the household, or changes in the home that cause anxiety). A detailed behavioural analysis is provided in the Merck Veterinary Manual's feline behaviour section.

How to tell spraying from inappropriate urination

Spraying

Small volume of urine
Deposited on vertical surfaces (walls, furniture legs, door frames)
Cat stands upright, tail raised and quivering
Cat typically continues using litter box normally
Occurs near windows, doorways, or new objects
Cause: communication / territorial stress

Inappropriate urination

Larger volume of urine
Deposited on horizontal surfaces (floor, bath mat, bed)
Cat squats as normal
Cat may stop using litter box
Can be accompanied by straining or crying
Cause: medical issue, litter box aversion, stress

Management

The first step is always a veterinary assessment to rule out medical causes (especially UTI or FLUTD, which can cause spraying-like behaviour). For confirmed behavioural spraying:

Neutering — most effective single intervention for intact cats; prevents spraying in ~90% of males before the behaviour starts
Reduce visual access to outdoor cats — frosted window film on lower panes, move furniture away from windows
Feliway Multicat diffuser — synthetic feline facial pheromone; reduces inter-cat tension in multi-cat households in several controlled trials
Environmental enrichment — additional resources (feeding stations, litter boxes, resting spots) reduce competition and stress
Enzymatic cleaning of marked spots — removes uric acid residue that would otherwise draw repeat marking

Clean marks immediately. Uric acid crystals left in fabric or plaster continue to signal the cat to re-mark the same spot. Standard cleaners do not break these down. Use an enzymatic pet urine cleaner and allow it to fully dry. Never steam-clean urine marks — heat sets uric acid permanently.

For persistent cases where environmental management has not resolved the issue, International Cat Care's detailed guide on urine spraying and a referral to an APBC-accredited animal behaviourist are the recommended next steps.

Frequently asked questions

Why do cats spray urine?

Spraying is a normal feline communication behaviour. Cats spray to mark territory, signal reproductive status, and manage emotional stress. It is distinct from house soiling caused by medical problems (UTI, FLUTD) or litter box aversion — spraying cats typically still use their litter box normally. The behavioural basis is reviewed in Merck Veterinary Manual's feline behaviour chapter.

Does neutering stop spraying?

Neutering before spraying behaviour starts prevents it in approximately 90% of male cats. In cats that have already begun spraying, neutering stops it in around 80–90% of cases according to studies reviewed by International Cat Care. Female cats can also spray, though it is less common; spaying reduces the behaviour significantly in intact females.

How do I stop my neutered cat from spraying?

Identify the trigger. Common causes in neutered cats: outdoor cats visible through windows (territorial anxiety), a new pet or person in the home, changes in routine, or inter-cat conflict in multi-cat households. Management strategies include: blocking sight lines to outdoor cats, providing additional litter boxes, using Feliway Multicat diffusers (synthetic feline facial pheromone), and environmental enrichment to reduce stress. For persistent cases, a veterinary behaviourist or APBC-accredited animal behaviour counsellor can develop an individual behaviour plan.

How do I clean cat urine spray properly?

Standard household cleaners often contain ammonia or bleach, which intensify the smell to cats and can encourage re-marking on the same spot. Use an enzymatic cleaner specifically formulated for pet urine — these break down uric acid crystals that ordinary cleaners leave behind. Products containing biological enzymes (such as those containing Bacillus bacteria) are most effective. Avoid steam cleaning — heat sets uric acid permanently into fabric.

Is spraying the same as a cat not using the litter box?

No — these are distinct behaviours with different causes. Spraying involves small amounts of urine deposited backwards onto vertical surfaces (walls, furniture legs, curtains), usually while standing and treading. Inappropriate elimination involves larger amounts on horizontal surfaces and may indicate litter box aversion, medical issues, or inadequate box provision. The distinction matters because the solutions are different. See the AAHA Feline Life Stage Guidelines for a diagnostic framework.