Why Do Cats Spray? Causes of Urine Marking and What It Means

By Tailwisp Editorial TeamUpdated October 20, 20264 min read

Few cat behaviors are more distressing for owners than spraying. The smell is strong, and the stains are stubborn. But spraying is not misbehavior. It is communication, and it often points to something the cat is worried about.

What is spraying?

Spraying, or urine marking, is when a cat deposits a small amount of urine on a vertical surface, such as a wall, door, furniture or curtain. The cat usually stands, backs up to the surface, raises its tail, which may quiver, and treads with its feet. The urine contains pheromones and chemical messages about the cat's identity, status and reproductive state.

Spraying versus litter box problems

Regular urination is usually done in a squat on a horizontal surface, in larger amounts. Spraying is a standing posture, on vertical surfaces, in small amounts. Sometimes cats also mark horizontally. If your cat is squatting and urinating outside the box, see why is my cat peeing outside the litter box.

Why cats spray

Sexual signaling. Unneutered males and females in heat spray to attract mates and warn rivals. Neutering usually stops this in most cats. See when to spay or neuter a kitten.

Territory and insecurity. Cats spray when they feel threatened or want to claim territory. Triggers include:

• Cats outside the window or neighborhood cats
• A new pet or baby
• Conflict between cats at home. See aggression between cats.
• Visitors or construction
• Moving house. See moving house with a cat.
• Changes in routine
• New furniture or smells

Stress and anxiety. Spraying can be a coping mechanism. See cat separation anxiety.

Litter box issues. A dirty or poorly placed box can contribute. See where to put the litter box.

Medical problems. Urinary tract disease, kidney disease, hyperthyroidism and arthritis can cause inappropriate urination or marking.

See the vet first

Any change in urination deserves a vet visit. Signs that need urgent care include straining, crying in the litter box, blood in the urine or frequent small amounts. See signs of a urinary blockage in cats and the emergency warning signs guide. Use the US vet directory to find a clinic.

Who sprays?

• Unneutered males are most likely.
• Neutered males and females may also spray, particularly in multi-cat homes.
• Cats in households with many cats are at higher risk because of competition.

Reading the pattern

Where the cat sprays can give clues.

• Windows and doors: outside cats or noises
• Your belongings: insecurity, seeking comfort, or stress about your absence
• Near other cats' areas: conflict
• New items: unfamiliar scent

Keep a diary of when and where it happens.

What not to do

• Do not punish or rub the cat's nose in it.
• Do not use ammonia-based cleaners.
• Do not ignore it, since marking can become a habit.

See how to stop a cat from spraying for solutions, and how to remove cat urine odor for cleaning.

Spraying in multi-cat homes

In homes with several cats, spraying may signal tension. One cat may be bullied, or cats may compete for resources. Watch for signs of conflict, such as staring, blocking and hiding. Make sure each cat has its own food, water, litter and resting spots, spread through the house. Gentle reintroduction techniques can reduce conflict. See how to introduce a new cat to your cat.

Female cats and spraying

Female cats can spray too, especially when in heat or stressed. Spaying usually reduces this. Spayed cats may still spray in response to stress or conflict. Look for triggers, and treat them as you would for a male cat.

Spraying and health

If spraying starts suddenly in a previously clean cat, a medical problem is possible. Pain from cystitis, bladder stones or arthritis can lead cats to avoid the box or mark. Early veterinary advice can prevent a habit from forming.

Keeping a record

Write down each incident with date, time, place and what was happening. A diary reveals patterns, such as spraying after visitors or when an outdoor cat appears. Share the record with your vet or behaviorist. It makes diagnosis and treatment much faster.

When to call a professional

If spraying continues despite your efforts, or if the cat shows signs of illness, call your vet. A behaviorist can examine the household, the cat's history and triggers, and suggest changes that work. Early help prevents the habit from becoming entrenched, and it reduces stress for the whole household.

Prevention

Neuter cats early. Provide enough resources and space, and reduce stress. See cat-friendly home setup and indoor cat enrichment ideas.