Kitten: birth to 1 year (human age 0 to 15)
Huge growth and learning. Vaccines, deworming, neutering (often around 4 to 6 months) and lots of gentle handling and play to build a confident adult. Feed a kitten food, around 3 to 4 meals a day.
Young adult: 1 to 6 years (15 to 40)
Peak health. A yearly check-up with dental exam and vaccines as needed. The main threats are boredom, weight gain and urinary problems in indoor males.
Mature adult: 7 to 10 years (44 to 56)
Metabolism slows, so weight creeps up. Start yearly blood and urine tests to set a baseline. Keep up play and use puzzle feeders.
Senior: 11 to 14 years (60 to 72)
Kidney disease, an overactive thyroid, diabetes, arthritis and dental disease become common. Vet visits every 6 months, with blood pressure checks. Low-sided litter trays and steps help stiff joints.
Super senior: 15+ years (76+)
Focus on comfort, hydration and keeping weight up. Watch for confusion, yowling at night and changes in litter habits.
Find your cat's exact human age with the cat age calculator.
Frequently asked questions
At what age is a cat considered senior?
Around 11 years under International Cat Care guidelines. AAHA/AAFP 2021 guidelines simply call cats over 10 "senior".
How long do indoor cats live?
Typically 13 to 17 years, and many live past 20. Outdoor cats usually have shorter lives because of traffic, fights and disease.