Large13.7 yr avg
Australian Shepherd
AKC · Herding
View breedComparison
Australian Shepherd vs Shih Tzu
Side-by-side comparison from peer-reviewed sources. Lifespan and health figures draw on Royal Veterinary College VetCompass and AKC breed data.
At a glance
Side-by-side
The numbers that most change day-to-day care. A citrus border marks a meaningful advantage.
Large
Australian Shepherd
Lifespan13.7 yrrange 12–15
SizeLarge
Weight40–65 lb18.1–29.5 kg
Height18–23 in45.7–58.4 cm
Senior at6 yrgeriatric at 10
AKC groupHerding
Energy5/590 min/day
Trainability5/5
Shedding3/5
With kids5/5
With other dogs3/5
Small
Shih Tzu
Lifespan12.8 yrrange 12–13
SizeSmall
Weight9–16 lb4.1–7.3 kg
Height9–10.5 in22.9–26.7 cm
Senior at8 yrgeriatric at 12
AKC groupToy
Energy3/545 min/day
Trainability4/5
Shedding1/5
With kids5/5
With other dogs5/5
Health
Common health issues
Top 3 prevalence-ranked conditions for each breed. See each breed's full health profile for screening schedules and source data.
Australian Shepherd
- Moderatetypical onset ~8 yr
Degenerative Myelopathy
Description and veterinary guidance for Degenerative Myelopathy land in Phase 4. Prevalence and onset-age figures above are drawn from https://ofa.org/diseases/disease-statistics/.
- Moderatetypical onset ~6 yr
Adult-Onset Cardiac Disease (Echocardiogram)
Description and veterinary guidance for Adult-Onset Cardiac Disease (Echocardiogram) land in Phase 4. Prevalence and onset-age figures above are drawn from https://ofa.org/diseases/disease-statistics/.
- Low prevalencetypical onset ~7 yr
Cataracts
Description and veterinary guidance for Cataracts land in Phase 4. Prevalence and onset-age figures above are drawn from https://ofa.org/diseases/disease-statistics/.
Shih Tzu
- High prevalencetypical onset ~8 yr
Degenerative Myelopathy
Description and veterinary guidance for Degenerative Myelopathy land in Phase 4. Prevalence and onset-age figures above are drawn from https://ofa.org/diseases/disease-statistics/.
- Moderatetypical onset ~2 yr
Elbow Dysplasia
Description and veterinary guidance for Elbow Dysplasia land in Phase 4. Prevalence and onset-age figures above are drawn from https://ofa.org/diseases/disease-statistics/.
- Moderatetypical onset ~5 yr
Periodontal Disease
Description and veterinary guidance for Periodontal Disease land in Phase 4. Prevalence and onset-age figures above are drawn from https://ofa.org/diseases/disease-statistics/.
Synthesis
Which is right for you?
Australian Shepherd and Shih Tzu have similar median lifespans, around 13.3 years.
Size gap is meaningful: the Australian Shepherd is large and the Shih Tzu is small. Expect different considerations for housing, travel, and vet-care costs.
Energy levels differ significantly. Australian Shepherds need substantially more daily exercise than Shih Tzus — plan for 90+ active minutes per day with the Australian Shepherd.
Shih Tzus carry a heavier breed-specific health burden (1 high-prevalence conditions vs 0 for the Australian Shepherd). Budget for screening accordingly.
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