Indoor versus outdoor cats

If you’re looking to start a fight, ask a bunch of cat lovers whether cats are better off living indoors or outdoors.
In truth, there are valid arguments to be made on both sides of this debate. I’ll cover most of them in this post.
That doesn’t mean that I don’t have an opinion about whether cats should be kept inside or out. I do. I feel strongly that cats should be kept indoors, even though they miss out on some of the benefits of an outdoor life. The advantages to a cat of indoor living far outweigh the disadvantages, in my view.

I also believe that loving cat guardians can capture some of the benefits of a wild life for their indoor kitties, with a bit of effort. I’ll share those ideas in this post, too.
And finally, I’ll discuss whether (and how) you can transition an outdoor cat to living indoors, if that’s what you decide to do.
A short history of cats living indoors
The question about whether cats should live inside or not is a thoroughly modern one.
Until around the 1800s, animals in the Western world were not kept as pets. They were meant to be eaten, or used for some other purpose. People just didn’t get emotionally invested in their animals.
In the 19th century, people start feeling differently about pets

The Victorian era (in the U.S. as well as Europe) was a time of social change, and with it came a different point of view regarding pets. Victorians were interested in the idea of a moral society, and viewed pet ownership as character-building for children. It was believed that caring for a pet would teach children to be responsible.
A Victorian’s idea of the kinds of animals that make good pets was sometimes different from ours. A person of means could buy an expensive pedigreed dog, but a working-class person might just capture and keep a wild animal, like a blackbird. The wealthiest families would show off their status by importing exotic animals, like wild parrots or monkeys, to keep as pets.[1]
But what about cats?
Two inventions allow cats to live indoors
While some people viewed cats with affection during the late 1800s to early 1900s, they were still primarily considered to be mouse-killing machines. People who kept cats did so mostly to keep the vermin population at bay.
In fact, keeping cats indoors as pets was not really possible until the advent of two important inventions.
Spaying and neutering

Can you imagine keeping a bunch of intact spraying, howling, fighting, and mating cats all together indoors? Me neither.
Unfortunately, techniques for safely spaying and neutering pets hadn’t been developed, and weren’t accessible to most people, until the 1930s. Cats needed to be kept outdoors at least some of the time, by necessity, until then.
(Read about when cats can be safely spayed and neutered in this post.)
Kitty litter
Until the 1950s, cats used the world as their litter box. Enterprising guardians might keep a pan of dirt, ashes, or sand as an indoor toilet for their cats, but most people just kept their cats outside.

Clay litter was discovered, accidentally, in 1947 (by Ed Lowe), but the use of litter boxes didn’t catch on until Tidy Cat actively began marketing the product in the mid 1950s.[2]
Cats could not be easily be kept indoors until litter and litter boxes became widely available.
Do most people keep their cats indoors or outdoors?
As a world, we’re divided about how and where to keep our cats.
According to an international study, 63% of Americans keep their cats indoors exclusively, while most Europeans and Australians allow their cats to come and go.[3]
Those statistics may be changing, however. In the United Kingdom, more than 26% of people now keep their cats indoors,[4] up from just 15% in 2011.[5]
The benefits of keeping cats indoors

The number one benefit of keeping cats indoors might be the most compelling: indoor cats live longer. A LOT longer.
While an indoor cat is likely to live at least 15-17 years, the life expectancy of an outdoor cat is only two to five years.[6] What happens outdoors to cats that shortens their lives?
- feline leukemia (FeLV)
 - feline immunodeficiency virus (FIV)
 - feline infectious peritonitis (FIP)
 - feline distemper (panleukopenia)
 - upper respiratory infections.[8]
 

The dangers of allowing your cat outdoors aren’t limited to the cat herself. Letting a cat roam can have a devastating impact on wildlife. Even well-fed cats will satisfy their need to hunt at the expense of birds and small animals:
The benefits of keeping (or allowing) cats outdoors

While indoor cats live longer and physically safer lives, they also lead more monotonous lives. Indoor living can lead to a number of physical and psychological health problems in cats.
Boredom. There are fewer opportunities for indoor cats to engage in important natural behaviors, such as exploring and hunting. A cat who has no outlet to express her cat-ness can experience significant frustration.
Can you make an outdoor cat an indoor cat?
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You can acclimate an outdoor cat to living inside, so long as you dedicate yourself to the process, and commit to providing a stimulating indoor environment for your cat.
Provide climbing structures, such as tall cat trees and towers, wall-mounted cat shelving and hammocks, or ramps and ladders, to give your cat a variety of perches from which to view the world.
Provide a wide variety of toys, especially puzzle feeders (anything from this simple treat ball by Catit, to this fancy activity board by Trixie), that encourage a cat to work for his food.  Rotate toys frequently, so that even “old” toys feel new and exciting again.
How to bring the outdoors to your indoor kitty
Just because your cat lives indoors, doesn’t mean that he can’t enjoy a little bit of life on the wild side.
There are ways to limit your cat’s exposure to the dangers of the outdoors, without preventing her from enjoying some of the unique smells, sights, and textures of the outside world. Some cats love the feel of wind in their whiskers, and grass between their toe beans.
Depending on your living situation, one or more of these options might work for you and your cat:
And, a catio could be as simple as an enclosed balcony or fire escape, or even a dog crate connected to an open window. If you’re handy, you can make your own simple catio. Here’s a great post on the topic by Adventure Cats.
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Dawn LaFontaine is a lifelong animal lover who always seems to have a little pet hair in her keyboard. Her blog, Kitty Contemplations, helps cat guardians better understand and care for the special beings they share their lives and homes with. Her cat-products business, Cat in the Box, sells beautiful, well-made, and award-winning products that she designed to meet the biological needs of cats.
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FOOTNOTES
[1] Mahdawi, Arwa. “How the Victorians Turned Mere Beasts into Man's Best Friends.” The Guardian, Guardian News and Media, 19 Oct. 2019, https://www.theguardian.com/lifeandstyle/2019/oct/19/pets-how-victorians-turned-beats-into-mans-best-friends.
[2] “The History of the Domestic Cat.” Alley Cat Allies, https://www.alleycat.org/resources/the-natural-history-of-the-cat/.
[3] Foreman-Worsley, Rachel, et al. “Indoors or Outdoors? an International Exploration of Owner Demographics and Decision Making Associated with Lifestyle of Pet Cats.” Animals : an Open Access Journal from MDPI, U.S. National Library of Medicine, 20 Jan. 2021, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7909512/.
[4] Finka, Lauren R, et al. “Owner Personality and the Wellbeing of Their Cats Share Parallels with the Parent-Child Relationship.” PloS One, U.S. National Library of Medicine, 5 Feb. 2019, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6363285/.
[5] “Paw Report on Animal Well Being 2015 - PDSA.” Paw Report 215, PDSA, https://www.pdsa.org.uk/media/2629/pdsa-paw-report-2015.pdf.
[6] “Can an Indoor Cat Be a Part-Time Outdoor Cat?” PetMD, https://www.petmd.com/cat/care/can-indoor-cat-be-part-time-outdoor-cat.
[7] “Roadkill.” Wikipedia, Wikimedia Foundation, 27 Oct. 2022, https://en.wikipedia.org/wiki/Roadkill.
[8] “Indoor Cats vs. Outdoor Cats.” American Humane, 8 July 2022, https://www.americanhumane.org/fact-sheet/indoor-cats-vs-outdoor-cats/.
[9] “Cats and Birds.” American Bird Conservancy, 25 Sept. 2020, https://abcbirds.org/program/cats-indoors/cats-and-birds/.
[10] Care, International Cat. International Cat Care, 9 Sept. 2019, https://icatcare.org/indoor-only-or-outdoor-access/.
[11] “2018.” Association for Pet Obesity Prevention, 12 Mar. 2019, petobesityprevention.org/2018
[12] Gait, Cathy. “Vets and Dog Trainers Want You to Stop Using Retractable Leashes.” Furtropolis, 23 Aug. 2022, https://outwardhound.com/furtropolis/water-safety/why-are-retractable-leashes-bad.
                