Why Indoor Cats Outlive Outdoor Felines. The Surprising Factors Impacting Lifespan


Cats who live exclusively indoors typically live significantly longer than cats who go outdoors. Indoor cats are better protected from environmental dangers like cars, predators, diseases from other animals, weather, and getting lost. Outdoor cats face many more risks and dangers, so their average lifespan tends to be much shorter. According to studies, the average lifespan for an indoor cat is about 15-20 years, while outdoor cats average only 2-5 years on average. By keeping cats indoors, owners can ensure a safer, healthier, and longer life for their feline companions.

Reduced Dangers

Keeping cats indoors protects them from many of the dangers that outdoor cats face on a regular basis. According to the American Humane Society, outdoor cats have a lifespan that is 2-5 years shorter than indoor cats on average.

Outdoor cats are at risk of being hit by cars. In one study, it was found that indoor cats lived nearly 10 years longer on average than outdoor cats in the same area, with car accidents being a major cause of death for the outdoor cats [1].

Outdoor cats also face threats from predators, territorial fights with other cats, and accidents like falls from trees or buildings. They can accidentally get trapped in sheds, garages, or under porches. Outdoor cats are also more likely to encounter and ingest poisons or toxic substances like antifreeze which can be fatal [2].

By keeping cats inside, owners can protect them from these many hazards and dangers that exist outdoors.

Better Nutrition

Indoor cats benefit from better nutrition versus outdoor cats because owners control their diet, rather than having to hunt or scavenge for food. Indoor cat owners can provide a consistent, balanced diet tailored to their cat’s needs (1). High-quality commercial cat foods designed for indoor cats provide complete and balanced nutrition, with the right amounts of protein, fat, carbs, vitamins and minerals (2). Some tips for optimal indoor cat nutrition include providing a high-protein animal-based diet, adding moisture through wet food, ensuring adequate fiber, and choosing a food formulated specifically for indoor cats (3). With a nutritionally balanced diet, indoor cats are less likely to be malnourished and are generally healthier.

Since indoor cats do not have to hunt, they tend to be less active. Owners can monitor their food intake and feed portion-controlled meals to prevent obesity. Obesity is unfortunately common in indoor cats; a controlled, measured diet helps prevent weight gain and obesity-related diseases (1).

(1) https://be.chewy.com/whats-the-difference-between-indoor-cat-food-and-regular-cat-food/
(2) https://www.thehonestkitchen.com/blogs/pet-food-ingredients/best-diet-for-indoor-cat
(3) https://todaysveterinarypractice.com/nutrition/proactive-nutrition-for-the-healthy-indoor-cat/

Vet Care

Regular veterinary checkups and treatment are crucial for extending longevity in cats. According to research, neutered cats that received regular veterinary care lived on average 1.7 years longer for males and 0.6 years longer for females compared to unneutered cats or those not receiving regular vet care (https://journals.sagepub.com/doi/10.1177/1098612X14536176). Annual exams allow vets to detect any health issues early and prescribe preventative care or treatment to address problems before they become severe. Vets can also provide nutritional advice, vaccines, dental cleanings, parasite prevention, and diagnostic testing tailored to the individual cat’s needs. All of these proactive health measures reduce mortality risk and contribute to a longer, healthier life for indoor cats under a vet’s care.

Less Stress

Indoor cats live in a more stable environment free of many dangers and stressors, which contributes to their longevity. Without the stresses of the outdoors, indoor cats experience less anxiety day-to-day. Persistent stress can shorten a cat’s lifespan considerably, much like it does in people, according to https://foxvalleyanimalhospital.com.au/cat-stress-feline-health/ and https://iheartcats.com/5-ways-you-might-be-shortening-your-cats-lifespan/. Keeping cats indoors provides them with a safe, comfortable home environment free of the stressors they’d face outdoors like territorial disputes, diseases, predators, cars, and extreme weather. With lower stress levels, indoor cats are able to live longer, healthier lives.


Indoor cats can still get plenty of exercise, even without access to the outdoors. Cat owners should provide toys and cat trees to allow indoor cats to play and climb. According to How Much Exercise Do Indoor Cats Need?, indoor cats tend to get much less exercise than outdoor cats, so it’s important for owners to provide adequate opportunities for exercise and play. Interactive toys like feather wands and laser pointers allow cats to chase and pounce, satisfying their predatory instincts. Scratching posts and cat towers give cats a place to climb, scratch, and survey their territory from up high. Rotating toys keeps cats interested and prevents boredom. Dedicating time for daily play sessions is also recommended to keep indoor cats active and engaged.


Getting a cat spayed or neutered provides major health benefits that can extend their lifespan. Spaying eliminates the risks associated with pregnancy and birth, while neutering reduces the chances of testicular and prostate cancer later in life. According to the Human Society, sterilization also “reduces or eliminates” the risk of ovarian, uterine and mammarian tumors in female cats (Source). The Banfield Pet Hospital similarly found that neutered male cats live 62% longer and spayed female cats live 39% longer than intact cats (Source). By removing the urge and ability to mate, spaying and neutering eliminate behaviors that put cats at risk of injury, disease transmission, or death. Overall, sterilization allows cats’ bodies to focus energy on vital functions rather than reproduction, supporting longevity.

Less Parasite Exposure

One of the main benefits of keeping cats indoors is that they are less exposed to parasites and infections that outdoor cats commonly encounter. According to research from the National Center for Biotechnology Information, indoor cats have reduced risk of contracting parasitic infections like fleas, ticks, and intestinal worms compared to outdoor cats.

Fleas and ticks are very common in outdoor environments and can easily latch onto a cat’s fur when exploring yards, parks, or wilderness areas. When brought indoors, these parasites can infest the home and create an annoying problem for pets and owners. Keeping cats inside avoids this issue altogether.

Intestinal worms like roundworms, hookworms, and tapeworms are also very prevalent outdoors, spread through contaminated soil, feces, or rodents that cats may eat when hunting. These worms can cause diarrhea, vomiting, and malnutrition. Since indoor cats do not hunt prey or dig in the dirt, their risk of ingesting worm larvae or eggs is almost zero.

By avoiding these parasitic hazards, indoor cats enjoy reduced scratching, skin irritation, and internal discomfort. Their indoor environment can be kept clean and free of infestations. Overall, the controlled indoor space leads to less parasite exposure and healthier, more comfortable cats.

Reduced Diseases and Parasites

Keeping cats indoors significantly reduces their risk of contracting infectious diseases and parasites. According to the American Humane, outdoor cats are exposed to diseases spread by other cats, wildlife, and insects. Diseases like feline leukemia virus, feline immunodeficiency virus, rabies, and distemper are much more prevalent in outdoor cat populations. In one study published in Preventive Veterinary Medicine, over 70% of outdoor cats tested positive for at least one pathogen, while only 20% of indoor cats tested positive.

Outdoor cats also face increased exposure to parasites like fleas, ticks, worms, and mites. These parasites can cause discomfort, anemia, and transmit other diseases. A controlled indoor environment greatly reduces exposure to parasites. According to Banfield Pet Hospital, indoor cats are much less likely to contract debilitating parasitic diseases.


In summary, indoor cats can live longer lives than outdoor cats for a variety of reasons. Indoor cats are not exposed to the dangers that outdoor cats face from cars, predators, diseases transmitted by other cats, and more. Indoor cats generally receive better nutrition from their owners and regular veterinary care. The controlled home environment also reduces stressors and allows indoor cats to get regular exercise and playtime. Owners can further support their cats’ longevity through proper spay/neuter surgeries and preventing parasites. While indoor cats may still get certain illnesses, their risks are greatly reduced versus outdoor cats. With attentive care from owners, the average indoor cat can live a long, healthy life of 15 years or more.

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