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.

Do Cats Keep Mice Away? Vet-Approved Facts & FAQ

long-tailed mouse close up

While some people find mice adorable and keep them as pets, they’re decidedly less than cute when you come upon one of the cheese-loving rodents late at night while heading to the fridge for a snack.

If you suspect there might be mice running around in your home and have been looking for ways to take action, you might have wondered if getting a cat would be an effective way to keep future rodent visits to a minimum.

Contrary to popular belief, cats aren’t a great solution for getting rid of mice. Read on for more information about cats and their odd relationship with mice.

divider cat paws oct 2024

So a Cat Won’t Help When It Comes to Getting Rid of Mice?

Mice are indeed afraid of cats, but that doesn’t mean that the little rodents will stay out of or vacate any house where a cat lives. Most often, mice will avoid the areas where your cat hangs out, limiting themselves to those places where your feline companion simply doesn’t go, like behind walls or in attic crawl spaces. Cats essentially drive mice into hiding, but that doesn’t mean your problem has been solved.

Nor will the presence of a cat prevent mice from entering your house. Mice are attracted to food, so if you leave dirty dishes in the sink or crumbs on the floor all day after eating breakfast, you’ll eventually end up with mice. Keep in mind that mice enter homes more often in cold weather.

Nice warm houses provide shelter from cold, wet weather and are often reliable food sources that rodents turn to when foraging outdoors becomes more challenging during winter. The mere presence of a cat won’t keep a cold, hungry mouse from making a home in your attic in the middle of the winter.

a brown long tailed mouse
Photo Credit: Ralphs_Fotos, Pixabay

What About Used Cat Litter & the Smell of Cat Urine?

Mice are hardwired to be scared of cats, and the smell of cat urine generally increases stress in mice to the point where they’ll avoid places that trigger the instinctive fear reaction. Unfortunately, the smell of cat urine doesn’t always convince mice to go elsewhere. Mice that are repeatedly exposed to cat urine during their development sometimes don’t exhibit the same reaction as rodents with limited exposure to cat scents.

divider cats oct 2024

Then There’s Toxoplasma Gondii

Toxoplasma gondii is a parasite that does strange things to mice. If a rodent ingests food or water contaminated with the parasite, the mouse acts strangely, and often loses its natural fear of cats (and other predators). Mice infected with the parasite will stand right in front of a cat and wait to be pounced on! Toxoplasma gondii has developed quite an elegant survival mechanism. It only undergoes sexual reproduction in one environment: feline intestines. Mice catch the parasite by eating food or drinking water contaminated with cat feces containing it.

They then become attracted to cats that kill and eat these infected rodents, ultimately pooping out more Toxoplasma gondii laced excrement for mice to ingest. Once this cycle starts, your cat might attract mice instead of repelling them! This also means your cat would be positive for the parasite and a health risk for you too, especially if you or someone you know is pregnant 1.

Some Cats Don’t Hunt Well

black and white young cat looking at a mouse outdoor
Photo Credit: 165106, Pixabay

Yes, you read that right! Despite the perception most of us have of cats as super predators who are able to take down all manner of rodents and small mammals, several felines don’t hunt well, either because they’re not interested or never mastered the skill. These cats will sometimes bat at a mouse but won’t do much more than that. Other cats will run away from strange creatures like mice, rabbits, and guinea pigs.

There are even cats that will happily hunt but won’t kill their prey. If you have an outdoor cat that hunts and catches rodents but won’t kill them, you could have a serious problem on your hands since there’s a good chance your buddy will bring home a live mouse to give you that ends up living in your home.

divider cat faces 2 oct 2024

Your Cat Won’t Be Able to Keep Up the Pace

Mice are super breeders. One mouse can have anywhere from four to 10 babies every 3 weeks, and mice reach sexual maturity 4 to 7 weeks after birth. Just one pregnant mouse in your house can result in thousands of creatures running around your home within just a year. No cat, not even a skilled killer with a high hunting drive, can efficiently eliminate that many rodents.

Rodents Can Be Dangerous

Mouse poop turds feces under a bathroom sink for pest control or home repairs
Image Credit: Pegasene, Shutterstock

Mice carry nasty diseases that can be dangerous for you and your cat. You don’t even have to touch an infected mouse to get sick. If a pathogen is present in the mouse’s feces or urine, that too can get you seriously ill.

Rodents can harm your cat by exposing them to fleas and worms. Cats infected with tapeworms or roundworms often have vomiting, diarrhea, and weight loss signs. They sometimes have distended abdomens and pale gums due to difficulty absorbing nutrients. If your cat makes a meal of a mouse that’s recently eaten rodent killer, your buddy could end up getting sick from pesticide ingestion.

divider cat faces 2 oct 2024

Larry the Chief Mouser as Evidence

You don’t have to take our word for it when it comes to observing the relationship between cats and mice. There’s plenty of evidence regarding the prey-catching prowess of Larry the Chief Mouser to the Cabinet Office. He lives at 10 Downing Street, the official residence of the Prime Minister of the United Kingdom, and he is allegedly responsible for keeping the area rodent-free.

Larry was adopted from the Battersea Dogs & Cats Home in 2011 after rodents were seen running across the steps of the Prime Minister’s residence. It took Larry 2 months to catch his first mouse, and that was only after a fair bit of encouragement. He was given a toy rat to “stimulate” his predatory instincts. Larry spends far more time harassing pigeons, feuding with Palmerston (the Foreign Office’s resident cat), and stealing food from reporters than catching mice.

divider single cat paw oct 2024

Conclusion

While it is true that some cats will keep mice away, it’s also possible that your cat simply isn’t interested in that activity at all. Really, it depends a lot on the individual cat. Plus, it’s not something we recommend having your cat do anyway.


Featured Image Credit: Ralphs_Fotos, Pixabay

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

Simply Nourish Cat Food Review of 2025: Recalls, Pros & Cons

Review Summary Simply Nourish is a PetSmart brand, sold exclusively at PetSmart, at least officially. It’s a healthier alternative to commercial pet foods...

How Long Can You Leave Wet Cat Food Out? Vet-Verified Health & Safety Info

The clock starts ticking as soon as you open your cat’s can of food. Feline wet food will grow bacteria, accumulate bacterial toxins,...

8 DIY Cat Water Fountains You Can Build Today (With Pictures)

Cats aren’t similar to humans, but we are similar to our feline friends regarding water consumption. Generally, the more water we consume, the...

Can Cats Eat Guava? Vet-Approved Facts & FAQ

Guava is a popular fruit for various reasons. It’s no shocker that humans delight in and derive nutrients from this tropical fruit. But...

More related

Pregnant Cat Nipples vs Normal: Vet-Verified Differences Explained

Both male and female cats have nipples, but the female’s nipples will change during and after pregnancy to accommodate the nutritional needs of...

7 Tips for Helping Your Kids Start a Pet-Sitting Business

When the kids grow eager to earn a little extra cash, it’s time for parents to foster their entrepreneurial spirit. Any parent can...

8 Best Cat Beds in Canada in 2025 – Reviews & Top Picks

Almost nothing is cuter than looking at your cat all curled up and cozy while taking a much-needed catnap. So, now you’re in...

Cat Brain Anatomy: Vet-Verified Facts & Common Disorders

Anyone who knows a cat is familiar with just how different they act from humans. Sometimes, they do things that leave us feeling...

Keep reading

Why Is My Cat So Hyper All of a Sudden: 8 Possible Reasons (Vet Reviewed)

For some cats, it is not rare that they will have a moment of wildness and suddenly charge around the house. For others, it can be a surprising and sudden occurrence. While it might simply be a case of your...

cream tabby maine coon cat playing water

Can You Use Shredded Paper for Cat Litter? Vet-Approved Facts & Tips

All cat owners are familiar with the traditional clay cat litter, whether you started with it or still use it today. However, when scooping that dusty litter box becomes too much to bear, you might have come across an exciting...

Shredded Paper

Do Cats Hate Having Their Whiskers Touched? Feline Anatomy Explained

Whiskers aren’t just there to make your cat look cute. They act as an important sensory feature to pull signals from the environment into your cat’s brain and nervous system. Because their whiskers are so sensitive, some cats hate having...

close up of cat whiskers

How Do Vets Put Cats Down? Vet-Verified Facts & Info

There will always be the dreaded day we have to say goodbye to our beloved pets. There never seems to be a good way to go about that, and it never seems like the right moment. It’s something we all...

sad, bored or sick cat

Can Cats Drink Tea? Vet-Approved Nutrition Advice

Tea is a common beverage in many households, and it’s not uncommon to wonder if you can give some to your cat. It’s also not unusual for your cat to sneak a sip when you’re not looking, causing some concern....

Can Cats Drink Tea

Can Stress Give a Cat Diarrhea? Vet Approved Signs, Causes & Treatment

Stress can undoubtedly cause cats to have gastrointestinal problems, including diarrhea. Although diarrhea can be triggered by stress, the condition can also be caused by various medical problems. Therefore, it is crucial to have the issue evaluated by a veterinarian...

Ginger cat in blue litter box

Does Hot Water Kill Fleas on Cats? Vet-Approved Facts & FAQ

Having a cat in your life is wonderful, but it sometimes comes with a catch: dealing with fleas. Apart from being annoying, flea infestations can trigger allergies, irritation, and even illness. So, getting rid of them as quickly as possible...

woman bathing her cat

Why Does My Cat Sleep Between My Legs? 5 Reasons for This Behavior

We’re never going to understand our cats and their quirky behavior! If your cat loves to snuggle up for a nap between your legs, you might be shaking your head as to why, especially since you can’t easily change position!...

cute red cat sleeping on the human's legs