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.

An Outdoor Cat Is Upsetting My Indoor Cat, What Do I Do? Vet Approved Advice

domestic cat looks at the street from the window of the house

If your ordinarily peaceful indoor cat suddenly shows signs of stress or even aggression, you might wonder what’s happening. One possible cause for these behaviors is the presence of an outdoor cat in your yard or on your property. Whether stray or owned, outdoor cats can cause a lot of anxiety for your indoor pet, so what can you do to fix the problem?

If an outdoor cat is upsetting your indoor cat, the best thing to do is keep your pet from visualizing or smelling the intruder. Unfortunately, this can be easier said than done, but you’ll find some expert advice on how to proceed in this article. We’ll also cover other reasons your cat could be stressed and the signs to look for that indicate your pet is dealing with anxiety.

divider cat paws oct 2024

The Trouble with Outdoor Cats

Even if your cat is generally friendly towards other felines, an unfamiliar outdoor kitty can still be stressful for them. Cats are territorial by nature, and the outdoor intruder will seem like an invasion of privacy. They may also spray urine or otherwise try to mark your house or yard. Naturally, your cat considers these areas theirs and may feel threatened by this behavior.

Any vocalization or attempts to get inside your house by the outdoor cat can cause further stress on your indoor cat.

Outdoor cats may also bring fleas and other parasites into your yard that could spread to other pets. They may harass birds at your feeders or dig up your flower beds to use as a toilet. Both you and your cat will benefit from dealing with these roaming felines.

European wild cat on the tree
Image Credit: Vladislav T. Jirousek, Shutterstock

Signs of Stress in Cats

If an outdoor kitty stresses your indoor cat, redirected aggression is one of the biggest signs you may notice. Your cat can’t get outside to attack the source of their stress, so they turn their anger on other pets or even on you. Multi-cat households can turn into a war zone overnight through no fault of their own.

Cats can also display other physical and behavioral signs of stress, including:
  • Peeing in inappropriate locations
  • Overgrooming
  • Vocalizing
  • Hiding
  • Loss of appetite
  • Urinary issues
  • Diarrhea

If you are concerned or have questions about your cat’s wellbeing, 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 single cat paw oct 2024

How to Keep Outdoor Cats from Upsetting Your Indoor Cat

1. Block the View

One way to keep an outdoor cat from stressing your indoor pet is to keep your cat from seeing the intruder. You can block your windows with blinds or curtains or confine your cat to an interior room temporarily until you can keep the outdoor cat from coming around.

Young woman closing roller shutters on the balcony on a summer day
Image Credit: Olezzo, Shutterstock

2. Remove the Attraction

In some cases, outdoor cats may be hanging around your yard because they’re attracted by a bird or squirrel feeder. If you remove or relocate the feeder, you may remove the incentive for them to be there.


3. Remove the Outdoor Cat

If you know who owns the outdoor cat upsetting your pet, try speaking to the owner about keeping their kitty confined. Many towns have rules about keeping pets restricted to their owner’s property. If you suspect the cat is a stray, contact your local shelter or community cat organization for assistance.

neighbors talking by the gate
Image Credit: ImYanis, Shutterstock

4. Keep the Outdoor Cat Out of Your Yard

If removing the cat completely is out of the question, here are a few options to repel them from your yard instead.

  • Automatic lights or sprinklers can scare outdoor cats if they enter your yard.
  • Discourage cats from digging in your flower beds by placing chicken wire, mulch, or other uncomfortable items under the soil’s surface.
  • Plant herbs like rosemary around your yard or garden. It’s safe for them to be around, yet most cats dislike the smell of the plants.
  • If you have accommodating neighbors or open space in your neighborhood, try making a more appealing location for stray cats to gather. Plant catnip and other cat-friendly plants to attract kitties and provide shelter, food, water, and a “litter box” area.
  • As a last resort, you may need to secure your property with a cat-proof fence.

divider cat paw scratch oct 2024

Other Causes of Stress in Cats

It’s important to keep in mind that outdoor cats aren’t the only cause of stress and anxiety for your pets. Other common sources of stress are a new pet, baby, or human roommate entering the household. Cats can also become stressed by construction or loud noises inside or outside the house.

Cats can also develop separation anxiety or become stressed from boredom or medical issues. Many of the signs of stress we discussed earlier can also indicate health problems. You must rule out these medical issues before you conclude that stress is to blame.

A vet can also help you manage stress in your cat, no matter the cause. Possible solutions include medications, increased environmental enrichment, providing more litter boxes or beds, and giving your cat more one-on-one attention. Pheromone sprays or plug-ins may also help.

divider cat faces 2 oct 2024

Conclusion

Outdoor cats can upset your indoor cat, causing numerous signs of stress and redirected aggression. However, you can try following our tips to help deal with the problem of kitty intruders and restore peace in your household. If you are struggling to handle your cat’s stress, do not hesitate to ask a veterinarian for help.


Featured Image Credit: Simol1407, 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

8 Pet-Friendly Hotels in Houston, TX (2025 Guide)

Houston is a Texan powerhouse of industry, nightlife, culture, and cuisine that you’ll never want to leave. Really, the biggest challenge you’ll face...

How Long Should a Cat Be Confined After Being Spayed or Neutered? Vet-Approved Recommendations

Spaying and neutering your cat is highly recommended, not only for the prevention of health and behavioral problems, but also to help combat...

16 Fruits & Vegetables That Cats Can Eat: Vet-Reviewed Facts & Tips

Cats are obligate carnivores by nature, so as long as their diets are well-balanced, like they would be in the wild, they don’t...

Love, Nala Cat Food Review 2025: A Detailed Look

If you’re like me (and so many other obsessive cat owners) and spend too much time on Instagram stalking adorable kitties, then you...

More related

Can My Stress Affect My Cat? 5 Tips on How to Help Your Cat in This Situation

Everyone feels stressed from time to time, but did you know that your stress could affect your cat too? We usually change our...

Can Cats Eat Pancakes? Vet-Verified Nutritional Facts & Health Advice

If you have a family tradition of eating pancakes for breakfast on a Saturday morning, you might feel bad for excluding your cat....

Rabies in Cats: Our Vet Explains the Causes, Signs & Treatment

Rabies is a severe, usually deadly disease caused by the rabies virus (Rabies Lyssavirus). It is present throughout the world and can affect...

Valor the Blind Kitten Lives Up to His Name

Originally published on Jul 24, 2013 and republished in remembrance of Valor who passed away in May 2022. There was obviously something wrong...

Keep reading

Are Fiddle-Leaf Figs Toxic to Cats? Vet-Reviewed Houseplants Examined

With over 400,000 different land plant species on our beautiful green planet, indoor plants have become extremely popular. 1 Plants clean the air that you live in, are low maintenance, reduce noise, look nice, and add life to any space....

Catster_Are Are Fiddle-Leaf Figs Toxic to Cats

Can Cats Eat Worms (Earthworms)? Vet Approved Facts & Safety Tips

Cats are carnivores by nature, and they’ll chase after and hunt any animal they can when they’re outside. This includes even the smallest, most unlikely of prey, such as earthworms! Cats are opportunistic hunters who’ll eat any small creature if...

Can Cats Eat Worms (Earthworms)

How to Syringe Feed a Kitten: 5 Vet-Approved Steps & Safety Guide

In some cases, syringe feeding a kitten may be necessary, and while this form of feeding isn’t the best, it is the only way to nourish some kittens. Syringe feeding is best done under the direction of a veterinarian, as...

Kitten wrapped in a towel drinks medicine from a syringe

Do Cats Have a Clitoris? Feline Reproduction Facts & FAQ

If you’ve ever wondered if female cats have clitorises, the answer is yes; it’s an anatomical part shared by all female mammals! Fetuses all start with a structure called the genital tubercle that becomes a penis when exposed to fetal...

Curious cat

Burmese Cat Health Problems: 14 Vet-Verified Issues

Bringing a cat into your home is always a fun and exciting prospect, but it also involves learning a lot about your new furry friend. You’ll need to discover the kind of food they like to eat and what litter...

Catster_Health Problems of Burmese Cats

5 Cat-Safe Incense Alternatives for Your Home: Vet Approved Advice

Incense is used in many homes to freshen the air in the home and cover unpleasant smells. Unfortunately, it is generally not considered safe for homes with cats. The exposure to the smoke from the incense can be irritating to...

Close up to Mint leaves in a pot

Evolve Cat Food Review of 2025 : Recalls, Pros & Cons

Review Summary Crafted with premium, whole-food ingredients, Evolve cat food contains exactly the nutrition your feline needs to stay in peak health. It’s a bit pricey, but you’re getting quality recipes for what you pay. Granted, not all cats love...

Evolve Cat Food Review

6 Best Cat Eye Drops in 2025 – Reviews & Top Picks

Does your kitty have problems with their eyes, requiring a little extra help? Eye problems can spawn from various causes, which can be irritating or painful to our feline companions. So, as a good pet owner, you want to make...

vet applying eye drops to cat's eyes