Chihuahua vs Shih Tzu

Side-by-side comparison of two popular breeds — temperament, exercise, grooming, lifespan and common health issues. Use it to decide which breed fits your home.

Chihuahua vs Shih Tzu — at a glance

The Chihuahua (1.5–3 kg, 14–17 years) and the Shih Tzu (4–7 kg, 10–16 years) sit in different — or sometimes overlapping — corners of dog ownership. Here's how they really compare for an everyday Irish or UK family.

Both breeds have similar energy demands — Chihuahua tips slightly higher but neither is a couch dog.

Grooming is where these breeds really diverge: the Shih Tzu needs significantly more brushing, washing and coat care. Factor in €30–€80 every 6–8 weeks for a professional groomer if you don't do it yourself.

If you have young children, the Shih Tzu is the clearly more child-friendly choice.

For a first-time owner, the Shih Tzu is much more forgiving than the Chihuahua.

For allergy sufferers, the Shih Tzu is the lower-shed, more hypoallergenic option.

Insurance premiums for breeds with brachycephalic, joint or cancer predispositions run 20–40% above average — check before you commit. We have a free quote calculator here.

	Chihuahua	Shih Tzu
Group	Toy	Toy
Origin	Mexico	Tibet / China
Weight	1.5–3 kg	4–7 kg
Height	15–23 cm	20–28 cm
Lifespan	14–17 years	10–16 years
Energy level
Trainability
Grooming needs
Good with kids
Good with other pets
Hypoallergenic
Watchdog instinct
Novice-owner OK

Chihuahua

Temperament

Bold, alert, devoted, vocal. Chihuahuas attach intensely to one person and can be wary or even snappy with strangers and other dogs without socialisation. They generally tolerate other Chihuahuas and small calm dogs better than large boisterous ones.

Exercise

20–30 minutes of gentle daily walking plus indoor play. Easy to over-exercise — joints are tiny.

Grooming

Smooth-coat: weekly brush. Long-coat: 2–3× weekly. Bathe every 6–8 weeks. Prone to dental tartar — daily brushing helps.

Health

Patellar luxation. Hydrocephalus (puppies — domed skull). Tracheal collapse (use a harness). Dental disease (small mouths). Hypoglycaemia in young/very small dogs. Heart murmurs.

Full Chihuahua profile →

Shih Tzu

Temperament

Gentle, friendly, slightly aloof, content. Shih Tzus thrive on company and dislike being left alone. They're playful but not high-energy, and generally good with children, other dogs and cats.

Exercise

30 minutes of daily walking plus indoor play is plenty. Brachycephalic features mean they overheat easily — avoid hot weather and strenuous exercise.

Grooming

Long double coat. Daily brushing if kept long; most owners choose a "puppy cut" every 4–6 weeks for ease. Hair around eyes needs daily wiping (eye discharge collects). Top-knot to keep hair out of eyes.

Health

Brachycephalic airway syndrome (mild). Eye issues (proptosis — eye popping out — in trauma). Patellar luxation. Hip dysplasia. Dental disease (small crowded mouths). Generally long-lived for a brachycephalic breed.

Full Shih Tzu profile →

Which is right for you?

Pick the Chihuahua if

Apartment dwellers, retirees, single-pet households, allergy-tolerant owners.

Pick the Shih Tzu if

First-time owners, retirees, apartment dwellers, allergy-sensitive families.

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