Age and life stages
Human-year comparisons, life stages and how care changes as your pet gets older.
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When Is a Dog Considered a Senior? Senior Age by Size and Breed
Dogs become seniors in the last 25% of their expected lifespan: about 10 for small dogs, 8 for large and 6 for giants. See ages by size and breed.
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Cat Years to Human Years: Chart, Formula and Life Stages
A 1-year-old cat is about 15 in human years and a 2-year-old about 24, then add 4 a year. See the full vet chart, life stages and senior care tips.