Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Why Does My Cat’s Pee Smell So Strong All of a Sudden? Vet Approved Facts & FAQ

man cleaning smelly litter box

While cat urine generally isn’t known for smelling great, it’s often a sign to be concerned about if your cat’s pee smells really strong all of a sudden, as it can indicate that something may be going on.

Conditions that can commonly cause stinky urine include urinary tract infections and diabetes. Urine that is more concentrated, or older and decomposing, will also reek more than normal. A veterinarian should always evaluate cats if their urine suddenly starts to stink, particularly if they’re also showing any signs of illness, such as suddenly peeing outside of the litter box, hiding, withdrawing, or eating more or less. We explain the possible reasons why your cat’s pee smells so bad and when you should take them to the vet.

divider cat paws oct 2024

What To Do About Strong Pee Smells

Cat urine has a very strong ammonia smell, and not only does it smell unpleasant and acrid, but it can also be an irritant for home residents. Apart from having the right cat litter, regularly cleaning the litter box and having it in a well-ventilated area, using a litter additive or deodorizer can significantly help combat litter box odors. An enzyme cleaner works wonders for pet messes and odors making it a great addition to your kitty cleaning routine.

Combating tough cat litter smells is an ongoing battle for pet parents but luckily, there are products out there designed to help! Two products that significantly reduce odors are the Hepper Litter Additive and the Hepper Enzyme Spray.

Image Product Details
Best Enzyme Cleaner Hepper Advanced Bio-Enzyme Pet Stain & Odor Eliminator Spray Hepper Advanced Bio-Enzyme Pet Stain & Odor Eliminator Spray
  • Works on multiple surfaces
  • Gentle yet effective
  • Lifts stains & set-in odors
  • Best Litter Additive Advanced Bio-Enzyme Cat Litter Deodorizer Advanced Bio-Enzyme Cat Litter Deodorizer
  • Neutralizes odor within cat litter
  • Cat-safe
  • Unscented
  • At Catster, we’ve admired Hepper for many years and decided to take a controlling ownership interest so that we could benefit from the outstanding designs of this cool cat company!

    divider 3 paws

    What Causes Urinary Tract Infections in Cats?

    Urinary tract infections, or UTIs, can cause an increase and change in the smell of a cat’s urine. UTIs are usually caused by a bacterial infection, and are not as common in cats as they are in some other animals.

    Other signs of a UTI, which are similar to other causes of urinary tract disease, include frequent trips to the litter box, straining to urinate, only passing small amounts of urine, bloody urine and discomfort. If you see any signs that your cat is having difficulty passing urine, then you must take them to your vet immediately. Male cats (and rarely females) can suffer from a blocked bladder, when they are unable to pee, and this is life threatening.

    Diagnosis usually involves urine testing to identify the precise cause and ruling out other conditions with similar signs. UTIs are commonly treated with antibiotics, increasing water intake and anti-inflammatory pain medication may be prescribed.

    a siamese cat getting examined by a vet at the clinic
    Image Credit: Sergey Nivens, Shutterstock

    What Is Diabetes?

    Diabetes is a disease in which a cat’s body has difficulty making or using insulin, a hormone that keeps blood sugar levels balanced. Insulin is required for the transport of the glucose (sugar) in the blood, to the cells of the body where it is needed for energy. When cats have diabetes, their cells can’t get hold of the glucose in the bloodstream, which leads to high blood sugar levels.

    Cats can have type I or type II diabetes. Type II diabetes is far more common in cats than Type I. Cats with Type II diabetes are unable to respond to the available insulin adequately (insulin resistance), and they may also have a reduction in the amount of insulin being produced.

    A strong fruity or sweet urine smell can be one of the indicators of feline diabetes, it is usually coupled with other signs that may be more obvious. These include drinking more than usual, excessive urination, normal to increased appetite, and weight loss. The diagnosis usually requires blood and urine tests to narrow things down, and the treatment usually involves long term injectable insulin therapy.

    divider 3 paws

    The Importance of Hydration

    Proper hydration is essential for cats’ overall health; it’s just as important as ensuring they have access to high-quality food. A stronger ammonia smell from fresh urine may signal more concentrated urine. A lack of fluid intake can be a predisposing factor in the development of feline urinary tract disease, including UTIs. Cats with diabetes (especially uncontrolled) urinate a lot and so need to drink a lot more water to compensate and prevent them from becoming dehydrated.

    Providing cats with fountains and giving them more wet food are two ways to boost their water intake.

    Fountains

    Close up to a grey and white kitten drinking water at the pet drinking fountain
    Image Credit: Patcharida, Shutterstock

    Many cats naturally prefer to drink running water, much like they would if left to their own devices. A cat fountain may encourage your feline to drink more. As an added bonus, most include filters that help keep the water fresh as it circulates; remember that they generally need to be changed pretty frequently.

    Fountains are available in several materials: ceramic, plastic, and stainless steel. Some models feature multiple tiers and pools to give cats several ways to drink.


    Wet Food

    cat eating wet tuna food
    Image Credit: Svetlana Rey, Shutterstock

    Increasing the amount of wet food in a cat’s diet is a simple way to boost their water intake. Wet food contains a high percentage of water; it’s often the first ingredient listed on the label of pates and choices with sauces and gravies.

    While there are always exceptions, cats usually love wet food. Make sure to follow the feeding instructions on the package to ensure your cat gets the right amount to eat since dry food tends to contain more calories per ounce than wet food.


    Bowl Set Up

    You can take a few steps to create a pleasant drinking environment for cats, which may increase their interest in hanging out and drinking more. Cats dislike having their water bowls placed close to their litter boxes or food sources, and many prefer not to drink from receptacles made of materials that retain odors over time, such as plastic.

    Stainless steel and ceramic models don’t harbor bacteria if properly cleaned and can be thrown in the dishwasher. Washing the water bowl daily will keep bacteria and smells away.

    If you are concerned or have questions about your cat’s health, you can also speak to a vet from the comfort of your own home to help make a plan. They can determine when an in-clinic vet visit should be made.

    If you need to speak with a vet but can't get to one, head over to PangoVet. It's an online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

    PangoVet_Mention-in-Content for PangoVet2 save money

    divider cat paws oct 2024

    Frequently Asked Questions

    Which cat pee smells the worst?

    All cat urine will have some degree of smell, but male cats that have not been castrated are well known for having particularly pungent urine which is related to the hormones they eliminate when they pee. Older cats may also have smellier urine which can be a result of a loss of kidney function. Finally stale, old urine smells particularly strong as it decomposes over time.

    How to remove the smell of cat urine?

    As cat pee smells worse the longer it sits, clean the litter box regularly and clean up any urine elsewhere as quickly as possible. Enzyme based cleaners help get rid of the smell, but avoid any cleaning products that contain ammonia as if a cat smells it they may be more inclined to urinate in the same place again.

    Hepper Advanced Bio-Enzyme Pet Stain & Odor Eliminator Spray
    • ADVANCED ENZYMATIC CLEANER - Penetrates the most stubborn smells and stains at the deepest molecular...
    • FOR ANY MESS, ON ANY SURFACE - This pet odor eliminator cleans your carpets, floors, furniture,...
    • FRESH, NATURAL ODOR - Our unique formulation doesn't rely on dangerous or unpleasant chemical...

    At Catster, we’ve admired Hepper for many years and decided to take a controlling ownership interest so that we could benefit from the outstanding products of this cool cat company!

    divider 2 cats

    Conclusion

    All cat urine smells to some degree but a significant change or increase in smell may indicate a health problem, and should be assessed by a veterinarian. Conditions that may alter the odor of urine include diabetes and urinary tract infections, and more concentrated urine will have a stronger smell.

    As well as appropriate diagnosis and treatment from a veterinarian, having access to fresh water and encouraging cats to increase their intake, is vital for those suffering from many of the conditions that are related to stinky urine.

    See Also: 


    Featured Image Credit: xamnesiacx84, Shutterstock

    Want content like this delivered to you?

    Sign Up For Our Newsletter

    News, insights, expert advice, and everything cat

    * By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.

    How useful was this post?

    Click on a star to rate (you can leave written feedback after clicking submit)

    Help us improve Catster for pet parents!

    Your feedback really matters.

    What did you like about this post? Also how can we improve it?

    Join the conversation

    Leave a Reply

    You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

    Talk With A Vet Online

    Peace of mind,
    anywhere, anytime

    Affordable vet advice

    Is a Sandpaper Cat Scratcher a Good Idea? Vet-Approved Facts & Safety Guide

    If you’re thinking about making a DIY cat scratcher for your furry friend, you might be wondering if you can use materials that...

    Cat Reproduction & Mating: Vet-Approved Facts & Explanation

    Cat breeders and veterinarians aren’t the only ones who need to know about the feline reproductive system and mating behaviors. While the average...

    How to Trim the Nails of an Angry or Aggressive Cat (Vet-Approved Guide)

    If you ask Mojo, the cat, about his favorite pastimes, nail trims would definitely NOT be on the list. Sleeping and eating are...

    6 Tips for Sharing Your Home with Cats You Must Know

    When we decide to welcome a cat into our home, we can expect a few changes to occur. Your bathroom will have a...

    More related

    Does a Dryer Kill Fleas on Cat Bedding? Here’s What Science Says (Vet Answer)

    Fleas may be small, but they can cause us and our pets big problems. They are the most common external parasite of cats...

    How Much Does a Cat Blood Test Cost? 2025 Pricing Guide

    If the vet recommends blood tests, it’s easy to get confused about their purpose. After all, there are many types of blood tests,...

    Is Declawing Cats Illegal in Australia? Vet-Verified Facts, Reasons & Alternatives

    Declawing cats is heavily regulated in Australia, meaning that it is banned as a standard procedure and only permitted if it’s essential for...

    150+ Black and White Cat Names: Great Ideas for Your Tuxedo Cat

    First, congratulations on your decision to bring home a precious new family member! Bringing home a brand new kitty is an exciting time...

    Keep reading

    Do Flea Collars Work on Cats? Vet-Approved Facts & FAQ

    As much as we love our cats, dealing with fleas can be a huge pain. Flea collars are one method of flea prevention that many pet owners opt for, but do they actually work? The answer is yes, but they...

    tortie Oriental cat wearing flea collar

    Can Cats Eat Centipedes? Vet-Verified Facts & Recommendations

    In the mind of a cat, it may be more exciting to chase after insects and other creepy crawlers than it is to play with a feather toy or ball. Toys don’t speak to the natural instincts of felines like...

    Can Cats Eat Centipedes

    How to Find an Affordable Vet for Your Cat: 11 Easy Ways

    Despite your best intentions, you might not be in the same financial position when you first adopted your cat. Paying for your necessities might be difficult, never mind trying to cover medical care for your cat, especially in an emergency....

    vet-and-cat-owner-having-a-consultation-at-the-clinic_H_Ko_Shutterstock

    Cats Peeing on Shoes: 7 Vet Reviewed Reasons & How to Stop It

    Nothing is worse than slipping your feet into a pool of cat pee—in your own shoe. If your cat has made a habit out of weeing into your Nikes, you’re looking for solutions. But before you can stop the problem,...

    tabby-cat-pees-on-shoes

    Can Cats Have CBD Treats? Vet-Verified Safety & Benefits Explained

    You might’ve noticed all the hype about CBD (cannabidiol) in recent years. Maybe you’ve even tried it yourself. In people, CBD has been shown to help reduce or prevent seizures in some childhood epilepsy disorders as well as relieve insomnia...

    Can Cats Have CBD Treats

    Why Did My Cat Stop Sleeping With Me? 8 Possible Reasons & What to Do

    Do you ever wonder why your cat stopped sleeping with you? It’s a question that has puzzled cat owners for years. There are many reasons this might happen, but there are also some unexpected reasons you might not have considered....

    Cat sleeping

    Can Cats Eat PopTarts? Vet-Reviewed Facts & FAQ

    “Curiosity killed the cat” is a phrase that couldn’t be truer about some cats. It seems like you can’t leave them alone for more than a minute before they’re face first in something they’re not supposed to touch. The good...

    Can Cats Eat PopTarts

    Cat Airplane Ears: 4 Vet-Verified Reasons Why Cats Do This, Facts & FAQ

    Cats are known for their quirky behaviors, but one that continues to baffle pet owners is when they have “airplane ears.” This seemingly strange behavior does have a purpose, and it’s not necessarily a good thing when your cat has...

    Cat laying on the grass with airplane ears