American Shorthair Lifespan, Age, Weight, and Health
American Shorthairs descend from working cats brought to North America by early settlers. Hardy, adaptable, generally healthy, and one of the longest-lived breeds. The Marlboro Man of cat breeds.
American Shorthair age in human years
Based on the AAFP/AAHA feline life stage chart. Year one alone equals roughly 15 human years. Year two adds about 9 more. After that, each cat year is roughly 4 human years.
| Cat age | Human-year equivalent | Life stage |
|---|---|---|
| 1 year | 15 | junior |
| 2 years | 24 | prime |
| 5 years | 36 | prime |
| 8 years | 48 | mature |
| 10 years | 56 | senior |
| 15 years | 76 | geriatric |
| 20 years | 96 | geriatric |
Feeding American Shorthairs
Standard calculator math applies. Watch for obesity as they age into the senior window.
General cat feeding math: indoor adult cats need roughly 20 to 25 kcal per pound of ideal body weight per day. A 6to 15 lb American Shorthair needs about 120 to 375 kcal per day. Plug your kibble's kcal-per-cup from the bag to convert to cups.
Common health issues in American Shorthairs
These are the conditions most commonly reported by veterinarians and breed-club health surveys for American Shorthairs.
- Hypertrophic cardiomyopathy
- Polycystic kidney disease
- Obesity
- Dental disease
- Diabetes
Frequently asked about American Shorthairs
How long do American Shorthairs live?
Most American Shorthairs live 15 to 20 years, with a midpoint around 18. Senior-stage vet care usually starts around age 11.
What is the human-age equivalent for a American Shorthair?
Cat aging is more uniform across breeds than dog aging. The first year of a cat's life equals roughly 15 human years on its own. Year two adds about 9 more, putting a 2-year-old cat near 24 in human terms. Every year after that adds about 4 human years.
What should I feed my American Shorthair?
Standard calculator math applies. Watch for obesity as they age into the senior window. For the general formula, use the food portion math at adjustingstudio.com/paws/tools/food-portion-calculator. The dog version is also useful for cats once you adjust the activity multiplier downward for typical indoor housecats.
Is pet insurance worth it for a American Shorthair?
American Shorthairs typically run below average for lifetime vet costs. A savings account often pencils out better than a policy. Run the break-even calculator with a real quote to confirm for your situation.
What health issues are most common in American Shorthairs?
The most commonly reported issues for this breed are: Hypertrophic cardiomyopathy, Polycystic kidney disease, Obesity, Dental disease. Annual vet visits and breed-specific genetic testing (where available) are the standard preventive baseline.