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 Do Cats Hiss and Growl at Strangers? Vet-Reviewed Behavior Insights

siamese cat hissing

Hissing and growling are ways cats communicate how they’re feeling. Hearing your cat hiss and growl can be shocking and a bit embarrassing if they’re doing it when you have house guests. Some cats may hiss and growl at strangers because they’re frightened and don’t feel secure around people they don’t know. However, most cats will be indifferent to your guests, while curious and particularly affectionate cats may even come looking for attention.

The sounds your cat associates with strangers visiting your house may scare them, like a loud ringing doorbell, a pound on the door, or doors opening and shutting. When you add a strange person into the mix or loud children, it’s no wonder some cats growl and hiss when someone unfamiliar shows up.

divider cats oct 2024

How to Stop a Cat from Hissing and Growling at Strangers

Hissing and growling are both basic forms of feline communication, and these behaviors are meant to be intimidating. While it’s not easy to stop your cat from hissing and growling at strangers who show up at your door, you can help your kitty feel more comfortable and secure, so they don’t hiss and growl so often. 

A good way to curtail this behavior is to give your cat an escape route to bolster their sense of security. Adding a cat condo to a quiet and secure area may do the trick. Because cats like to hang out in high places and observe their environment from a safe distance, it’s a great idea to mount cat shelves on the wall, so your cat doesn’t feel trapped when strangers are around. Ensure they are not disturbed by visitors or children in this area, so they can enjoy their peace and quiet. They should have a litter box, food, water, and their toys close by.

If your cat never used to hiss at visitors and your friends and now they suddenly seem stressed or withdrawn when someone comes over, it’s important to consider there may be an underlying cause for such change in their behavior. This is commonly pain or illness. Get your cat checked out by the vet so they can have appropriate treatment. 

Also, something else may have caused your cat additional stress, such as seeing unfamiliar cats or animals through a window, and they have redirected their frustration from not being able to react to these sights to your house guests, who just so happen to be around. Always allow your cat to choose where they want to be and if they want to interact, as they will choose to get away if they don’t feel comfortable.

angry cat meowing outdoor
Image By: Piqsels

Spend Quality Time with Your Cat

Spending quality time with your cat can help reduce their fear and uncertainty around strangers. A little one-on-one time every day is a must anyway and can do wonders toward making your feline feel more confident and self-assured. With time and patience, you may try to include other family members and your frequent home visitors in this interaction, as long as your cat is feeling comfortable. Reward any calm and relaxed behavior when your guest is over with tasty treats, attention, and new toys to make it a positive and enriching experience.

Use an interactive cat toy for some fun playtime, but avoid making your cat frustrated by ensuring they can interact with the toy rather than it staying out of their reach. Also, do some clicker training with treats or go for walks outside on a harness. Nobody knows your cat as well as you do, so figure out ways to make them feel more confident and stimulated, both physically and mentally. Encourage your family and friends to spend time with your cat in a relaxed and quiet manner because this will also help to get them used to being around other people than just you! Starting from an early age is also very important in building good social skills and confidence.

cat playing with owner
Image Credit: Dora Zett, Shutterstock

Other Reasons Cats Hiss and Growl

Hissing is one of the ways for your cat to express fear and uncertainty and show that they want to be left alone. Besides expressing these emotions around strangers, cats also hiss and growl for other reasons, including:

  • To express pain: Pain caused by an injury or medical issue can trigger a cat to hiss and growl. If your cat hisses or growls when you pet or hold them or for no apparent reason, they may be in pain. Get your pet to the vet as soon as possible to see if they’re injured or sick.
  • To express unhappiness: Your cat may hiss or growl to tell you they’re unhappy or frustrated with something. Maybe it’s a new pet you’ve brought home or the smell of another cat on your clothes when you enter the house.
  • To express aggression: If your cat feels irritated or threatened by something like another animal or a loud sound, they may hiss and growl. In this case, hissing and growling are used to ward off a perceived threat as a form of self-protection. Unneutered male cats may be more aggressive during the breeding season, particularly if they encounter other males while searching for a female cat in heat.
  • To protect their territory: Both female and male cats are territorial and may hiss and growl when spotting a new cat in their garden. They will also spray and use other signs of communication to let the other cat know this is their territory.

Older cats may make unusual sounds when they’re disoriented, especially if they’re suffering from feline cognitive dysfunction or cat dementia. Elderly cats with dementia often wander around at night growling, howling, and even hissing due to confusion. If you have a senior cat that is vocalizing at night, set up an appointment with a vet.

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

Finally, many cats will feel uncomfortable and stressed coming to the vet and may hiss and growl at them as they feel vulnerable in an unfamiliar environment and have nowhere to escape. This is not uncommon, and your vet will do the checks as quickly as possible to ensure your cat is not getting increasingly stressed. Using a pheromone spray on the cat carrier in advance of your trip to the vet, placing a blanket on top of the carrier so the cat can’t see what is going on around them, making the car journey pleasurable and smooth, and allowing your cat to relax afterward is critical.

divider cats oct 2024

Conclusion

Even though it’s not nice to see your beloved cat hiss and growl at strangers, it’s normal feline behavior. To quell this behavior, give your cat an escape route, so they’re less likely to feel threatened or scared when strangers come around. Get them checked by a vet to ensure no underlying pain or illness is causing them to hiss or growl. 

You should also spend some quality time with your cat to boost their self-confidence. With a little work, patience, physical and mental stimulation, and positive reinforcement, you should be able to put a damper on all that hissing and growling! Speak to your vet or a feline behaviorist for professional advice in your specific circumstances.

Related reads:


Featured Image Credit: 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

Brown Munchkin Cat: Info, Pictures, Origin & Facts

The Munchkin Cat was first intentionally bred in Louisiana, USA, in 1980, although domestic cats with short legs have likely been around for...

Should You Let Your Cat Outside? Pros & Cons of Indoor & Outdoor Cats

To let or not to let your cat outside—that is the question. For some cat parents, this is never a quandary, as their...

22 Most Expensive Cat Breeds in The World (Info, Pictures & Prices)

Cats are some of the most popular companion animals on the planet. People welcome cats of all shapes and stripes into their lives...

Zelda Loves Bailey, But HATES Being Brushed

Hi, I’m Dr. Karyn! Read my introduction to learn more about me and meet my five hilarious cats: Clutch, Cyril, Alex, Zelda, and...

More related

Persian Kittens For Sale in Iowa: Breeders List 2025

Excited Cats advocates for adopting before shopping, though we fully understand there are many reasons for seeking a breeder. So, we encourage it...

8 Cat Nursery Rhymes (With Videos): Fun Poems for Kids & Their Pets

A great way to get your kids to bond with their pet cats is to let them sing nursery rhymes and poems to...

Can Cats Eat Popsicles? Vet-Reviewed Facts & FAQ

Most cats do not show a lot of interest in food other than the stuff that we owners put in their bowls. Therefore,...

Can Cats Eat Chives? Vet-Reviewed Facts & FAQ

Chives are pretty common in our human food. However, they are not suitable for our furry friends. Chives are toxic to cats and...

Keep reading

Are Frosty Ferns Toxic to Cats? Vet-Approved Facts & FAQ

Frosty ferns are delicate light green plants popular with gardeners everywhere. Its shimmery new sprouts make the entire plant look like it’s been delicately brushed with snow—hence the name! Frosty ferns, more precisely known as Selaginella kraussiana, aren’t ferns but...

Catster_Are Ferns Toxic to Cats

Can Cats Eat Cabbage? Vet-Reviewed Health and Nutrition Advice

With all of the health benefits that cabbage is said to have, you may wonder if it is safe to give some to your cats. Cats are obligate carnivores and thrive on a complete and balanced source of animal protein...

Can Cats Eat Cabbage

Can Cats Drink Alcohol? Vet-Verified Facts, Risks & Safety Tips

For some people, there is no better way to de-stress and wind down from a long and busy day than kicking back with your favorite glass of wine, beer, or spirit. You may notice your curious cat sniffing around your...

Can Cats Drink Alcohol

10 Best Lysine Supplements for Cats in 2025 – Reviews & Top Picks

Lysine is often used to treat symptoms commonly caused by feline herpesvirus infections. If your cat is diagnosed with this condition, your vet may prescribe or recommend a lysine supplement. If this is the case for your cat, there are...

cat having treat

Does Lemon Juice Kill Fleas on Cats? Vet-Verified Effectiveness & Safety Explained

Keeping our pets parasite-free is big business, with a projected 2026 global revenue of $3.68 billion.1 Fleas are quite the nuisance on several fronts. These pests can cause allergic reactions in pets while increasing the risk of secondary infections if...

lemon juice

What Shots Do Kittens Need? Vet-Reviewed Schedule, Facts & FAQ

Kittens need several vaccinations to protect them from infectious diseases. All kittens are susceptible to these diseases, no matter what their breed is. Therefore, these vaccinations are highly recommended and a part of most kitten’s early vet care. Let’s look...

vet giving kitten vaccine

9 Best Cat Foods for Diarrhea in 2025: Reviews & Top Picks

When your cat has diarrhea, it affects the entire household. There can be additional messes to clean up and unpleasant odors to contend with. Generally, diarrhea is a short-lived experience and things will go back to normal in a short...

cat eating kibbles from red bowl

10 Best Dry Kitten Foods (2025) – Reviews & Top Picks

Growing kittens need the right mix of nutrients, minerals, and vitamins to thrive, and the dry food you choose to feed these developing felines is an important choice. This stage of growth and development will set the stage for the...

two kittens eating cat food_shutterstock_MaraZe