Researchers have identified the simplest way to help your cat live longer: keep it indoors. Experts estimate that outdoor pet cats have lives at least two to three years shorter than contained pet cats.
The Hidden Dangers of Roaming
While cats are known predators of native wildlife, allowing them to roam outside exposes them to significant dangers. In Australia, 5.3 million domestic cats kill 546 million animals annually, but the risks to the cats themselves are often overlooked. About two-thirds of Australian cat owners have lost a cat while it was roaming. The top threats include road traffic accidents, fighting, and falls.
A recent research review published by scientists from Murdoch University confirms that keeping cats at home not only protects wildlife but also greatly enhances feline safety. The loss of a cat is tragic, but many owners also face high veterinary bills from injuries or lifelong health conditions caused by roaming. This issue is global, not limited to Australia.
Camera Studies Reveal Daily Perils
Studies using collar-mounted cameras provide a cat's-eye view of the hazards. In one US study of 55 free-roaming cats, 25% risked poisoning by eating or drinking unknown substances, 45% crossed roads, 25% encountered other cats, 20% crawled under houses, and 20% explored storm drains. Similar research in New Zealand found that 59% of 37 cats drank away from home, 40% ate away from home, 32% crossed roads, and 21% climbed onto roofs, risking falls. Australian cats are equally adventurous; one study of 428 radio-tracked cats recorded an average of 4.8 road crossings per day.
Deadly Outcomes
Trauma from road accidents, fights, and falls is the leading cause of death among free-roaming cats. In a UK study, road traffic accidents were the top cause of death for cats from under one year old up to eight years old. European estimates suggest 18–24% of cats are hit by a car during their lifetime, with about 70% of those incidents being fatal. Victims are often under five years old and predominantly male. Unneutered cats face higher risks due to wider roaming.
Even high-profile cats are not immune. Former New Zealand Prime Minister Jacinda Ardern's cat, Paddles, died after being hit by a car in 2017. Beyond accidents, roaming cats face serious infectious diseases like Feline Immunodeficiency Virus (FIV) and frequent fights that can lead to abscesses requiring expensive treatment. Deliberate cruelty, including poisoning and injury, also occurs globally. In one eight-month study of 55 roaming cats in Western Australia, two were poisoned, one lost a front leg in a traffic accident, one fractured canine teeth in a fall, and two needed treatment for fight wounds.
How to Keep Cats Safe
The simplest protection is containment on your property, as is standard for other domestic animals. Containment does not mean keeping cats indoors at all times. Backyards can be modified with fence-top rollers to prevent escape, or owners can build a 'catio'—an outdoor enclosure that allows fresh air and sunshine while keeping the cat secure. Many cats can be trained to walk on a harness or leash for supervised outings. A Norwegian report found that controlled outdoor access is often important for cat wellbeing.
Indoor cats need stimulation: outside views, toys, scratching surfaces, elevated spaces, and hiding spots. Since cats are solitary, they appreciate places to retreat. If they cannot go outside to toilet, provide two indoor litter trays per cat, cleaned frequently. In multi-cat households, offer one tray per cat plus an extra, placed in separate quiet locations away from food bowls.
Responsible Cat Ownership
Australians love their cats. In 2019, about a quarter of households owned a cat; by 2025, that rose to a third. Over the same period, households keeping cats indoors increased from 36% to 48%. This trend suggests growing awareness that indoor living is safer. As Aussie singer Eric Bogle wisely put it: 'Oh you who love your pussy be sure to keep him in. Don't let him argue with a truck, the truck is bound to win. And upon the busy road don't let him play or frolic. If you do I'm warning you it could be CAT-astrophic.'
