Shih Tzu Lifespan: How Long Do Shih Tzus Live?
Shih Tzus are long-haul dogs, 10 to 16 years with a healthy median around 13. Eyes, teeth, back and the flat face are where the years get won or lost.
How old is your Shih Tzu in human years?
Size-adjusted vet chart, Shih Tzu lifespan range, life stage and a shareable ID card.
How long do Shih Tzus live?
Breed clubs give a wide 10 to 16 range and UK data put the average around 12 to 13. Small-breed aging: a 13-year-old Shih Tzu is about a 68-year-old human.
For context, the size-class ranges we use across all breeds: small dogs 12 to 16 years, medium 10 to 14, large 9 to 12, giant 7 to 10. Individual dogs beat their breed's range all the time; the range is where the odds sit, not a ceiling.
What decides a Shih Tzu's lifespan
Eyes
Prominent eyes and a flat face mean corneal ulcers, dry eye and, rarely, proptosis. Squinting or a red eye is a same-day vet visit. Keep hair out of the eyes.
Teeth
Crowded jaws start dental disease early. Brushing and cleanings, as for every small breed.
Back
Intervertebral disc disease appears in the breed. Lean weight, no jumping off sofas, ramps where practical, and hind-leg weakness treated as urgent.
Airway and heat
Milder than a Frenchie, but still a short-nosed dog: avoid heat, watch weight, and treat noisy breathing as worth assessing.
Shih Tzu life stages and human-age equivalents
| Stage | Shih Tzu years | Human years | What matters |
|---|---|---|---|
| Puppy | under 1 | 0 to 15 | Growth, vaccines, socialisation window |
| Young adult | 1 to 3 | 15 to 32 | Adult body, teenage brain; habits and weight set now |
| Mature adult | 4 to 9.8 | 32 to 55 | Prime years; annual exams, dental care, lean weight |
| Senior | 9.8 to 16 | 55 to 80 | Twice-yearly exams and bloodwork (AAHA) |
| Golden years | 16+ | 80+ | Past the typical range: comfort first |
Human equivalents use the veterinary size-adjusted chart (small class); the senior threshold is 75% of the breed's mid-range lifespan.
Shih Tzu lifespan FAQ
How long do Shih Tzus live?
Typically 10 to 16 years, with most reaching 12 to 14 and some going past 16.
At what age is a Shih Tzu a senior?
About 10. Twice-yearly checks from then, with attention to eyes, teeth and mobility.
What do Shih Tzus usually die of?
Old-age decline, kidney disease and heart disease lead in the data, which is a good sign: the breed does not have one dominant killer.
Do Shih Tzus have breathing problems?
Some do, in a milder form than the flatter-faced breeds. Snoring is common; exercise intolerance or blue gums is not, and needs a vet.
Premiums rise with age, and nothing pre-existing gets covered
If you are going to insure a Shih Tzu, the math says do it while the dog is young and healthy. Real 2026 prices by provider, no forms.
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Sources: American Shih Tzu Club; VetCompass life tables (Teng et al., Scientific Reports 2022); Merck Veterinary Manual. Life-stage thresholds follow AAHA canine life stage guidelines. Last reviewed August 2026.