How Long Do Dogs, Cats, and Other Pets Live?
A Ranking of Common Pets' Life Expectancy, from Shortest to Longest
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Indoor-only cats have an average lifespan of 10 to 20 years. On the other hand, cats that only live outdoors have an average lifespan of 2 to 5 years. Keeping cats indoors can actually increase their lifespan as they are less likely to encounter predators or toxins.