How To Stop Cat Spraying (And Why Cats Do It in the First Place)

Cat spray is a foul-smelling liquid that’s projected onto a vertical surface by a male or female cat. It’s not the same as peeing outside the litter box.

“Cat spray is made of urine, but it is believed that there are subtle chemical differences between urine released as part of normal elimination when squatting (regular peeing) versus cat spraying, also called urine marking,” says Kate Anderson, DVM, DACVB, veterinarian and assistant clinical professor at Cornell University College of Veterinary Medicine in Ithaca, New York.

The telltale sign of urine marking is a cat backing up to an object, standing on all fours with their tail erect and quivering, while liquid is sprayed backward and upward onto their target of choice. This is often a wall, entryway, couch, or other vertical surface.

Almost always, cats spray as a way of marking territory.

“Much like a dog lifting [their] leg, cats mark their territory with this behavior,” says Gavin Casper, DVM, CVA, CVC, managing veterinarian at Hometown Animal Hospital in Weston, Florida. “Urine spraying allows cats to spread their scent onto a specific area.”

He says this behavioral problem often occurs with intact male cats (unneutered males), but that it can also occur when spayed or neutered cats become stressed or anxious.

Potential reasons cats spray urine:

• Territorial marking
• Scent communication
• Anxiety or stress
• Mating behavior
• Conflict in multi-cat households
• Medical issues such as urinary tract infections (UTIs)
• Changes in routine or that cat’s environment, like moving or introducing a new baby to the home
• Litter box issues (location, cleanliness, sharing)
• Aging-related medical causes

Cats dealing with urinary tract diseases, such as UTIs, cystitis, or bladder stones, may start spraying, Dr. Casper says. Age-related medical conditions, particularly cognitive decline, may increase or trigger this cat behavior as well.

See your veterinarian for a physical exam if your cat is scent-marking. They will likely run blood tests and check your cat’s urine to look for any underlying medical causes.

Stress is another common reason cats spray. “Changes such as a new pet or a new family member in the household; a move to a new location; addition of new furniture; or rearranging of existing furniture can trigger this behavior,” Dr. Casper says.

Ways to alleviate some of this stress:

• Make sure the litter box is clean and there’s one for each cat, plus an extra, each placed in different locations around your home.
• Provide your cat with enrichment items, like scratching posts, perches, and toys.
• Try soothing products, like diffusers that emit synthetic pheromones (Feliway® is a trusted option).
• Medication prescribed by your veterinarian.

To get rid of that offensive cat spray smell, clean the soiled area as soon as you notice it with an enzymatic cleaner, such as Rocco & Roxie Supply Co.® Pet Stain & Odor Eliminator or Nature's Miracle® Cat Stain Remover & Odor Eliminator. These enzyme-based cleaners neutralize the scent and minimize the chances of your indoor cat coming back to the area to spray again.

“[Cat spray] contains several sulfur-containing amino acids, including one called felinine, which is unique to small cats,” Dr. Anderson says. “These compounds themselves don't smell, but the breakdown products are highly pungent and increase as the urine sits. Microbes carried along with the urine likely also contribute [to the odor].”

Using a black light can help identify areas you might have missed.