All the info you need to make this crucial decision

Should you keep your kitty indoors or let them roam? It’s a dilemma that divides cat parents, and it’s one that definitely differs from country to country. Struggling to decide what to do with your cat? Our indoor versus outdoor cat guide will help you weigh up the benefits of the great outdoors against the potential risks and make an informed decision about what is best for your moggie.

Main Takeaways

In the UK, 67 percent of cats have access to both the indoors and the outdoors.
Outdoor access provides cats mental and physical stimulation, reducing boredom and allowing cats to engage in natural behaviours such as climbing, exploring and hunting.
Free-roaming cats face risks including road traffic accidents, disease transmission, poisoning, fights and theft.
On average, indoor cats live longer than outdoor cats.
Outdoor cats can harm wildlife.
Indoor cats can suffer from boredom, frustration, stress and obesity if they’re not provided with adequate mental and physical stimulation.

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Do vets recommend keeping your cat inside?

In the UK, vets generally advocate for outdoor access unless specific circumstances, such as age, disabilities or medical conditions, necessitate keeping them exclusively indoors. The UK Government Agency Defra’s Code of Practice for the Welfare of Cats states that if a cat is kept indoors, their guardian should provide sufficient space and activities to allow them to exercise, climb and play to prevent stress, obesity and related diseases.

Pros and cons of indoor cats

Pros

Potential longer lifespan.
Reduced risk of disease, injury and parasites.
A safer environment.

Cons

Lack of opportunities to engage in natural behaviours.
Greater risk of boredom, frustration and stress.
More likely to develop behaviour problems or become overweight or obese.
Increase in stress related health issues, such as urinary tract disease and overgrooming.

Pros and cons of outdoor cats

Pros

Greater mental stimulation.
A more natural, independent lifestyle.
More exercise.

Cons

Potential shorter lifespan if involved in an accident.
Risk of disease, injury, theft or loss.
Hunting behaviours impact local wildlife.

Should you let your indoor cat roam outside?

Start by assessing the risks in your area. The countryside is generally safer than urban areas. Busy roads can make free-roaming risky, as an indoor cat may not have the street smarts to avoid traffic, while a high density of cats makes territorial fights more common. Kittens shouldn’t be allowed to venture outdoors until they’ve had a full course of vaccinations, been microchipped and neutered.

How to keep your cat safe outdoors

Microchipping increases the chances of reunion with a missing kitty, and it’s now a legal requiremen t for all cats before 20 weeks of age. Vaccinations are essential, and regular parasite treatment is very likely to be needed, although speak to your vet about what the recommendations are for your area. Neutering will help deter them from straying too far from home, but if you have a keen explorer, keeping tabs on them with a GPS tracker will give you peace of mind. Opt for cat-safe plants, and avoid growing highly toxic lilies.

Vaccinations for outside cats

In addition to the core vaccinations which protect against cat flu (feline herpes and calicivirus) and enteritis (panleukopenia virus), the Royal College of Veterinary Surgeons recommends that outdoor cats are vaccinated against the feline leukaemia virus (FeLV), which spreads primarily through bite wounds inflicted during fights.

Do outdoor cats have more health issues?

Outdoor cats face higher risks of injuries and illnesses from traffic collisions, fights, attacks by dogs and foxes, plant or antifreeze poisoning. They’re also more prone to skin parasites, and hunters who catch and eat birds and rodents can become infected with intestinal worms.

Do indoor or outdoor cats live longer?

Indoor-only cats live, on average, around 10–16 years. While free-roaming outdoor cats can live long lives, studies show that their life expectancy can be much shorter. Most vets would argue that the breed of your cat is a more important factor in determining how long they live, as the risks of being indoors or outdoors varies greatly with where you live.

Will a cat’s behaviour change if they go outdoors?

Some cats become more confident and independent when given outdoor access, and many develop consistent routines of when they like to be inside and outside. However, they can develop territorial aggression, become aloof, or even up sticks and move in with a neighbour. Frightening encounters with territorial cats, fireworks and thunderstorms can cause fear and anxiety, potentially leading to undesirable behaviour changes like toileting outside the litter box or spraying inside the house (although these behaviours can also be seen in indoor cats that are stressed and want to go out!).

Reasons why you would keep your cat indoors

Cats with contagious diseases like feline immunodeficiency virus (FIV) should be kept indoors so they can’t mix with other cats. Blind or deaf cats lack the sensory abilities to detect hazards like traffic and other animals, making them particularly vulnerable, while cats with impaired mobility may be unable to escape danger. Hairless breeds like Sphynx cats can suffer from sunburn or hypothermia, but otherwise there are no breed specific reasons why a cat should be kept indoors.

Elderly cats and young kittens also struggle to regulate their body temperature, making them more susceptible to outdoor extremes of heat or cold. Cats who have not been neutered yet should be kept inside to prevent unplanned pregnancies.

It’s also advisable to keep your cat indoors for a few weeks if they’re a new addition to the family or if you’ve moved house. This will give them time to adjust to their new environment and discourage them from attempting to return to their old home.

Do cats get sad if they can’t go outside?

Cats may become depressed if they are suddenly denied outdoor access or if they have high prey drive and don’t have an appropriate outlet for predatory behaviour, such as interactive play sessions or food puzzles. They can also feel frustrated or anxious if they can see birds or an unfamiliar cat outside but can’t get to them, often resulting in redirected aggression towards their feline companions or pet parents.

Ways to let your cat enjoy the outdoors if they stay inside

Cat containment fencing or a catio can give your kitty the run of the garden, patio or balcony without the risk of them disappearing over the fence or getting into danger. Mesh window or door screening lets indoor-only cats enjoy fresh air. You can also grow pots of cat grass or create a sensory box filled with dried leaves or cat-safe herbs to bring the outside in. You may hear of people taking their cat outside on a lead or harness, or even travel in a pet pushchair, but vets and animal welfare organisations would not advise this. Cats are not small dogs, and are not meant to be restrained like this. Taking away their choice and control in this way can lead to severe anxiety and stress, with serious medical issues as a result.

Bottom line: keep your cat indoors or let them outside?

Consider your cat’s breed, temperament, health and life experience and the suitability of the environment to meet their specific needs. If you can mitigate any risks, outdoor access can benefit your cat’s physical, mental and emotional health. However, if safety is a concern, an enriched indoor life with access to an enclosed balcony, catio or secure garden is the best compromise. Remember you cannot change your cat’s innate personality, and being forced to live indoors or outdoors when they would rather do the other is a common cause of stress in cats.

Frequently asked questions about indoor versus outdoor cats

Is it better to have an indoor or outdoor cat?

There’s no definitive answer. Cats are individuals, so what suits one cat won’t necessarily be the right choice for another. It’s a myth that indoor cats can’t get sick or injured – they still face household hazards, including falls from windows or balconies and exposure to toxic plants, foods or cleaning products. Some cats find the outside world overwhelming rather than enriching, and having to be constantly vigilant or compete for territory can lead to chronic stress.

Are cats happy being kept indoors?

Most pet cats are happy in a stimulating indoor environment that provides three-dimensional space, multiple hiding places, litter boxes, toys and opportunities to express their natural behaviours. However, feral cats struggle to adapt to indoor living and can experience extreme fear in a confined, unfamiliar environment.

Is it cruel to keep a cat indoors?

No, as long as their species-specific and individual needs are met, indoor cats can live happy, healthy, fulfilling lives. However, providing inadequate mental and physical stimulation can reduce your cat’s quality of life and cause stress or obesity, which are associated with health issues including diabetes, urinary tract disease (FLUTD) and osteoarthritis.

Do cats benefit from being outside?

Yes, outdoor time provides cats with more space for exercise and exploration, the stimulation of an ever-changing environment, and the ability to engage in innate behaviours like climbing and hunting. In some cases, the risks can outweigh the benefits, but cat containment fencing, catios, and enclosed balconies provide the best of both worlds, keeping cats safe while allowing them to enjoy the smells, sights and sounds of the great outdoors.

References

Canine and Feline Sector Group. Code of Practice for the Welfare of Cats. Crown, Dec. 2017. Accessed 25 Feb. 2025.

“Feline Vaccination Guideline Recommendations - Comparison Tables.” RCVS Knowledge. Accessed 25 Feb. 2025.

Foreman-Worsley, Rachel, et al. “Indoors or Outdoors? An International Exploration of Owner Demographics and Decision Making Associated with Lifestyle of Pet Cats.” Animals, vol. 11, no. 2, Jan 2021, p. 253, https://doi.org/10.3390/ani11020253.

Kent, Michael S., et al. “Longevity and Mortality in Cats: A Single Institution Necropsy Study of 3108 Cases (1989–2019).” PLOS ONE, edited by Silvia Sabattini, vol. 17, no. 12, Dec. 2022, p. e0278199.

“Pet ‘Safe’ Plants.” Animal Poison Line, Veterinary Poisons Information Service (VPIS), 1 Aug. 2023. Accessed 28 Feb. 2025.

Taylor, Samantha, et al. “2 025 ICatCare Consensus Guidelines on the Diagnosis and Management of Lower Urinary Tract Diseases in Cats.” Journal of Feline Medicine and Surgery, vol. 27, no. 2, Feb. 2025.

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Should My Kitty Be An Indoor Or Outdoor Cat?