Cats allowed outdoors have an average lifespan of only 5 years (vs. 15 for indoor cats)
due to being hit by cars, injured or killed by dogs or wildlife, rat poison ingestion,
diseases caught by fighting with other cats, and nameless other accidents.
Some infections,
due to organisms like the Lyme
disease bacteria (a spirochaete), the bordetella bacteria that causes kennel cough or cat chlamydia, your pet can
catch again and again.