Allowing domestic cats to roam outdoors significantly shortens their lifespan and exposes them to numerous dangers, according to a recent research review. Australian researchers found that free-roaming cats face risks such as road traffic accidents, fights, falls, poisoning, and infectious diseases, leading to lives that are at least 2–3 years shorter than those of contained cats.
The review highlights that about two-thirds of Australian cat owners have lost a cat while it was roaming. Road traffic accidents are a leading cause of death for cats up to eight years old, with European estimates suggesting 18–24% of cats are struck by a car during their lifetime, and around 70% of those incidents are fatal. Risks are higher for male and unneutered cats, which tend to roam more widely.
Camera studies from the US, New Zealand, and Australia reveal the hazards cats encounter: crossing roads, drinking or eating away from home, encountering other cats, and climbing onto roofs. In one Australian study, radio-tracked cats averaged 4.8 road crossings per day. Infectious diseases like Feline Immunodeficiency Virus (FIV) and fight-related injuries are also common, often requiring expensive veterinary treatment.
The researchers recommend containing cats on the owner's property, not necessarily indoors at all times. Options include modifying backyards with fence-top rollers, building outdoor enclosures (catios), or training cats to walk on a harness. Providing indoor entertainment such as toys, scratching surfaces, and climbing spaces can also keep cats happy and healthy while contained.
