How Long After Neutering Does Cat Urine Stop Smelling?

One of the most common problems encountered by pet owners is the unpleasant odor of their pets’ urine. While you can buy some products that mask the smell of urine, it’s important to understand the underlying causes.

When you have an intact or unneutered male cat, there is an unmistakable odor. It’s a means for him and other cats to mark their territory. Neutering him will remove the strong odor from his discharge as well as diminish his desire to spray.

What’s more, why does my cat’s urine stink? If you leave the soiled litter in your cat’s litter box for more than five days, you’ll be left with a strong ammonia odor. While this is typical, strong scents may suggest a urinary tract infection, necessitating a visit to the veterinarian. What your cat eats may also have an impact on the fragrance of her pee.

How does castration affect behavior?

how long after neutering does cat urine stop smelling

Castration has little effect on behaviors that are influenced by male hormones (these are called sexually dimorphic behaviors). The temperament, training, and personality of a cat are mostly determined by heredity and upbringing, and are unaffected by male hormones. Castration is unlikely to bring a hyperactive cat to a halt or reduce hostility toward humans. Castration will diminish some, but not all, sexually dimorphic male behaviors since the male brain is masculinized by the time the kitten is born. Castration before sexual maturity helps to prevent secondary sexual traits like penile barbs, huge jowls, and glands in the dorsal region of the cat’s tail from developing.

What is neutering?

An orchidectomy is a procedure for neutering or castration of male cats. An incision is created along either side of the scrotal sac to allow each testicle to be excised or totally removed during the surgery, which is performed under general anesthesia. External sutures are rarely necessary. Prior to birth, both testicles in males descend via the inguinal canal into the scrotal sac from inside the abdominal cavity. One or both testicles may not fully descend into the sac in certain cats, and may stay in the abdomen or anywhere along the inguinal canal path to the scrotal sac.

These cats are known as cryptorchids, and locating and removing the testicles will need more invasive surgery. If the remaining testicles are not removed, they will continue to release hormones, causing the cat to behave like an intact male cat. In cats, vasectomies are not performed since they just sterilize the animal and do not stop the generation of male hormones. Castration’s behavioral advantages come from both sterilization and the absence of masculine hormones.

What are the benefits of neutering?

Population control

how long after neutering does cat urine stop smelling

Every year, millions of cats are killed in North America because there are many more kittens than homes. Because a single male cat can father many litters, neutering intact male cats is critical for population control. Despite the fact that castration significantly reduces sexual desire, certain experienced males may continue to express sexual interest in females.

“Cats do not have vasectomies since this surgery just sterilizes the cat and does not stop the production of male hormones.”


Indoor elimination in places other than the litter box is the most prevalent behavior issue in cats of all ages. Cats that spray or mark walls and other vertical home items account for a high number of these occurrences. Both indoors and out, adult male cats have a strong need to mark territory. In around 85 percent of male cats, neutering decreases or eliminates spraying.

“In around 85 percent of male cats, neutering decreases or eliminates spraying.”


Cats can fight whether they are neutered or not, although the majority of intercat aggressiveness occurs between intact males. Because intact male cats travel and guard a considerably bigger territory, this is a direct effect of male cat rivalry. Abscesses are a typical result of battles that result in punctures or wounds that penetrate the skin. In male cats, neutering minimizes fighting and the development of abscesses.

Roaming and sexual attraction

how long after neutering does cat urine stop smelling

Females and neutered males have far wider territories and travel longer distances than intact males. During mating season, the need to wander may be very intense. In nearly 90% of instances, castration minimizes wandering. Despite the fact that neutering significantly diminishes sexual attraction, certain experienced males may still be attracted to and mate with females.

Physical changes

The stench of male urine is especially strong and harsh. Castration causes a change in the odor of the urine to become more normal. After neutering, many owners remark that their intact males become cleaner, less odorous, and better groomers. Fighting-related abscesses are substantially less common, and several secondary sexual traits, such as overactive tail glands in the condition known as “stud tail,” can be significantly improved.

Does neutering lead to any adverse effects on health or behavior?

The stench of male urine is very strong and harsh.”

There are a lot of misunderstandings regarding how neutering affects your health and behavior. Neutered men are no more likely to gain weight or become sedentary if they eat well and exercise regularly. Caloric intake may need to be lowered when wandering, fighting, and mating activity decreases, and alternate types of play and activity must be offered. Hunting and other behaviors that arose independently of hormone cues are unaffected. Neutering has no effect on physical development regardless of the age at which it is performed (overall height and weight, urethral size). Although neutering a cat before puberty looks to have similar consequences to neutering a cat after puberty, every effort should be taken to neuter a cat before puberty to avoid the challenges, experiences, and behaviors that come with sexual maturity.


And even a teeny-tiny amount develops a stench over time. To combat this, empty the litter box on a regular basis, wash it with soap and warm water (not ammonia-based cleaners, as ammonia can make the smell worse), dry it, and replace it with fresh litter.


Castration reduces roaming in approximately 90% of cases. Although neutering greatly reduces sexual interest, some experienced males may continue to be attracted to, and mate with females. Male urine odor is particularly strong and pungent. Castration leads to a change to a more normal urine odor.
Neutering, when done early enough in life, virtually eliminates the odor of male cat urine and should prevent marking in male dogs.
The really stinky component of cat pee falls under the category of “pheromones.” Male cats and in particular “intact” male cats can have a high level of felinine in their urine. Felinine does initially have some scent to it, but as it breaks down, it gets stinkier and stinkier.
Effectively, cat urine odour can last forever. It’s one of the most persistent smells imaginable, with a way of hanging around no matter how much you try to scrub the stain or cover up the offending smell with air fresheners or pot-pourri.
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