Mix of Bulldog and Shih Tzu: The Complete Bull Tzu Breed Guide

If you've encountered a compact, wrinkly-faced dog with a silky coat and an outsized personality, you may have met a Bull Tzu — a mix of Bulldog and Shih Tzu that combines two beloved companion breeds into one decidedly unique package. This designer cross has been quietly gaining attention among apartment dwellers, seniors, and families looking for a sturdy but small companion dog.

But here's the reality that many breeder websites gloss over: designer mixes are inherently variable. One Bull Tzu puppy might inherit the Bulldog's stocky build and short coat, while its littermate could look almost entirely like a Shih Tzu. Understanding what's predictable — and what's a roll of the genetic dice — is essential before you commit to this cross.

This guide draws on breed standards from the AKC Bulldog standard and the AKC Shih Tzu standard, along with veterinary health data, to give you an honest, detailed picture of what to expect.

The Parent Breeds: What Goes Into a Bull Tzu

Before evaluating any designer mix, you need to understand the two breeds behind it. The Bull Tzu typically crosses an English Bulldog (not the American Bulldog, which is significantly larger) with a Shih Tzu. Occasionally, breeders use French Bulldogs, which produces a somewhat different result — we'll note those differences where relevant.

Parent Breed Comparison: English Bulldog vs. Shih Tzu

Trait	English Bulldog	Shih Tzu
Weight	40–50 lb (18–23 kg)	9–16 lb (4–7 kg)
Height	14–15 in (36–38 cm)	9–10.5 in (23–27 cm)
Coat	Short, smooth, moderate shedder	Long, flowing, double coat, low-shedding
Temperament	Calm, courageous, stubborn	Affectionate, outgoing, playful
Energy Level	Low to moderate (20–40 min/day)	Moderate (30–45 min/day)
Lifespan	8–10 years	10–18 years
AKC Group	Non-Sporting	Toy
Trainability	Low (independent thinker)	Moderate (can be stubborn)
Brachycephalic	Yes (severe)	Yes (moderate)

Both parent breeds are brachycephalic (flat-faced), which means breathing-related health concerns are virtually guaranteed to factor into any Bull Tzu's life. Both are also companion dogs bred primarily for temperament rather than working ability, which generally produces a friendly, people-oriented cross.

How Big Will a Bulldog and Shih Tzu Mix Get?

The size gap between the parent breeds is substantial — an English Bulldog can weigh up to five times what a Shih Tzu weighs. This creates one of the widest size variability ranges among designer mixes.

Bull Tzu Size Range Estimates

Category	Weight	Height at Shoulder
Small end (Shih Tzu-dominant)	12–20 lb (5–9 kg)	10–12 in (25–30 cm)
Average	20–35 lb (9–16 kg)	12–15 in (30–38 cm)
Large end (Bulldog-dominant)	35–45 lb (16–20 kg)	14–16 in (36–41 cm)

The most common outcome is a dog in the 20–35 lb range — a sturdy small-to-medium dog. However, because the English Bulldog is so much heavier, breeders sometimes use artificial insemination and typically breed the Shih Tzu mother to avoid dangerous pregnancy complications. If a French Bulldog (16–28 lb / 7–13 kg) is used instead, the size range narrows considerably to roughly 12–25 lb.

Practical tip: If size predictability matters to you — for apartment restrictions or travel carriers — ask the breeder for the exact weights of both parents and previous litters. Even then, expect a ±5 lb variance.

Understanding Generations: F1, F1B, and Beyond

Most Bull Tzus on the market are F1 crosses because the mix hasn't been established long enough for robust multigen lines. If a breeder advertises F2 or multigen Bull Tzus, ask for documentation of at least three generations of health-tested parents. Without that, you're paying a premium for a label that doesn't guarantee anything.

Temperament: Best-Case and Challenging Scenarios

Both parent breeds are companion dogs, so the Bull Tzu is overwhelmingly likely to be affectionate, people-oriented, and content with moderate activity. But the nuance matters.

Best-case temperament: You get a dog with the Shih Tzu's cheerful sociability and the Bulldog's calm steadiness — a dog that greets visitors happily, settles on the couch without fuss, plays gently with children, and doesn't bark excessively. This is the dog most breeders describe.

Challenging temperament scenario: You get a dog with the Bulldog's stubbornness amplified by the Shih Tzu's sensitivity — a dog that refuses to walk on leash, resource-guards food or toys, becomes anxious when left alone (both breeds are prone to separation distress), and is extremely difficult to train because neither parent breed is known for biddability.

Early socialization — exposure to diverse people, environments, sounds, and other dogs between 3 and 14 weeks of age — is the single most impactful thing you can do for temperament. Use positive reinforcement methods exclusively. Force-free training builds confidence in sensitive dogs, and both parent breeds respond poorly to harsh corrections.

Coat, Grooming, and the Hypoallergenic Question

Here's where the genetic lottery becomes very visible. A Bull Tzu can inherit:

• Bulldog-type coat: Short, smooth, single-layered. Easy maintenance — weekly brushing with a rubber curry brush. Moderate shedding year-round. This is the lowest-maintenance outcome.
• Shih Tzu-type coat: Long, flowing, double-coated. Requires daily brushing to prevent matting and professional grooming every 4–6 weeks (budget $50–$90 per session). Low shedding but high maintenance.
• Intermediate coat: Medium-length, slightly wavy, with some undercoat. The most common outcome. Needs brushing 3–4 times per week and professional grooming every 6–8 weeks.

Is the Bull Tzu hypoallergenic? No. No dog is truly hypoallergenic, and this mix is particularly unpredictable. If the puppy inherits the Bulldog's coat, it will shed moderately and produce normal levels of dander. Even Shih Tzu-coated Bull Tzus are "low-shedding" rather than non-shedding. If you have severe dog allergies, spend time with the specific puppy before committing — coat type can't be guaranteed at birth.

Regardless of coat type, pay attention to the facial wrinkles inherited from both brachycephalic parents. Clean skin folds daily with a damp cloth or veterinary-recommended wipe (such as Squishface Wrinkle Wipes, approximately $12–$16) to prevent yeast and bacterial infections in the folds.

Health Considerations: Hybrid Vigor Myth vs. Reality

Let's address a persistent marketing claim: that designer mixes automatically benefit from "hybrid vigor" and are healthier than purebreds. The reality is more complicated. Hybrid vigor (heterosis) can reduce the risk of recessive inherited diseases when two unrelated gene pools combine. But it does nothing to protect against conditions that both parent breeds share.

And the Bulldog and Shih Tzu share several significant health vulnerabilities:

Health Conditions Inherited From Both Parent Breeds

Condition	Description	Prevalence in Parents	Estimated Treatment Cost
Brachycephalic Obstructive Airway Syndrome (BOAS)	Narrowed airways causing breathing difficulty, exercise intolerance, heat sensitivity	Very high in Bulldogs; moderate in Shih Tzus	$1,500–$6,000 (surgical correction)
Hip Dysplasia	Malformed hip joint causing pain and arthritis	~35% in Bulldogs (OFA data); lower in Shih Tzus	$1,500–$7,000 (surgery per hip)
Eye Conditions	Cherry eye, entropion, dry eye, cataracts, corneal ulcers	High in both breeds due to prominent eyes	$300–$3,000 depending on condition
Patellar Luxation	Kneecap slipping out of place	Common in Shih Tzus; present in Bulldogs	$1,000–$3,500 (surgical repair)
Allergies (skin/food)	Atopic dermatitis, food sensitivities causing itching, ear infections	Very high in Bulldogs; moderate in Shih Tzus	$200–$800/year (ongoing management)
Dental Disease	Overcrowded teeth, early periodontal disease	High in both (brachycephalic jaw structure)	$500–$1,500 (professional cleaning + extractions)

The Merck Veterinary Manual's Bulldog overview notes that English Bulldogs are among the most health-challenged breeds in existence, with a median lifespan of just 8–10 years. The Shih Tzu's considerably longer lifespan (10–18 years) may help moderate this in the cross, but a Bull Tzu's lifespan is best estimated at 10–14 years — with significant individual variation.

Recommended health screenings for Bull Tzu parents (ask the breeder):

• OFA or PennHIP hip evaluation (Bulldog parent)
• OFA patella evaluation (both parents)
• CERF/OFA eye examination (both parents, annually)
• Cardiac evaluation (Bulldog parent)
• BOAS functional assessment — some veterinary programs now grade brachycephalic dogs on airway function

Always consult your veterinarian about an appropriate health monitoring plan for your Bull Tzu, especially regarding weight management. Even a few extra pounds dramatically worsens breathing problems in brachycephalic dogs.

What Does a Bull Tzu Cost?

Pricing for a Bulldog and Shih Tzu mix varies based on breeder reputation, location, generation, and whether artificial insemination was required (common with this cross due to the size disparity between parents).

Bull Tzu Pricing Breakdown (2026 Estimates)

Source	Price Range	Notes
Backyard breeder / online listing	$400–$800	No health testing; high risk of inherited conditions. Not recommended.
Reputable hobby breeder	$800–$1,500	Health-tested parents, take-back clause, limited litters per year
Premium designer breed program	$1,500–$2,500	Full OFA/CERF panels, multigen lines, early neurological stimulation
Breed rescue / shelter	$150–$450	Adult dogs or surrendered puppies; spay/neuter usually included

First-year ownership costs beyond purchase price: Budget approximately $1,800–$3,500 for initial veterinary exams, vaccinations (DHPP, rabies, bordetella), spay/neuter ($300–$700), microchipping, crate, harness (use a harness — never a neck collar for brachycephalic dogs), grooming supplies, and food. Pet insurance for a Bull Tzu typically runs $40–$75/month depending on coverage level and your location.

Rescue availability for this specific mix is limited, but Bulldog rescues (such as Bulldog Club of America rescue networks) and Shih Tzu rescues occasionally have mixed-breed dogs that fit this profile. Petfinder.com is a reliable search tool for finding Bull Tzus in shelters near you.

Who Is the Bull Tzu Best Suited For?

This mix is not a universal fit. Based on the trait profiles of both parent breeds, here's an honest assessment of who thrives with a Bull Tzu — and who should consider other options.

Excellent fit for:

• Apartment dwellers who want a sturdy but compact dog (the 20–35 lb range fits most breed restrictions)
• Seniors or retirees seeking a calm, affectionate lap companion
• Families with gentle children ages 8+ (the Bulldog side is patient, but young children can accidentally injure a small dog or trigger breathing stress during rough play)
• Work-from-home owners (both breeds are prone to separation anxiety; this is not a dog that does well alone for 8+ hours)
• Owners prepared for potential health expenses and committed to regular veterinary care

Poor fit for:

• Highly active owners seeking a hiking or running partner (BOAS risk makes sustained aerobic exercise dangerous)
• Hot-climate residents without reliable air conditioning
• First-time owners unwilling to invest in patience-based, positive reinforcement training
• Budget-conscious owners who cannot absorb $2,000+ in unexpected veterinary costs
• People with severe dog allergies (coat type and shedding are too unpredictable)

The Bull Tzu is, at its best, a deeply affectionate, comical, and loyal companion that bonds intensely with its family. At its most challenging, it's a stubborn, breathing-compromised dog that requires expensive ongoing care. The difference often comes down to the genetic luck of which parent's traits dominate — and the quality of the breeder's health testing program.

Frequently Asked Questions

What two breeds make up the Bull Tzu?

The Bull Tzu is a cross between an English Bulldog and a Shih Tzu. Some breeders use French Bulldogs instead, which produces a smaller dog with somewhat different temperament traits (French Bulldogs tend to be more playful and less sedentary than English Bulldogs).

How big will a mix of Bulldog and Shih Tzu get?

Most Bull Tzus fall between 20–35 lb (9–16 kg) and 12–15 inches (30–38 cm) at the shoulder, but the range extends from as small as 12 lb to as large as 45 lb depending on which parent's genes dominate. Ask to see both parents for a size estimate.

What is the Bull Tzu temperament like?

Expect an affectionate, people-oriented dog that enjoys lounging with its family. Most Bull Tzus are friendly with familiar people but may be reserved with strangers. Trainability varies widely — both parent breeds are independent thinkers. Early socialization and consistent positive reinforcement training are essential.

Is the Bulldog and Shih Tzu mix hypoallergenic or low-shedding?

No. The Bull Tzu is not hypoallergenic. If the puppy inherits a Shih Tzu-type coat, it will be low-shedding but still produce allergenic dander. If it inherits a Bulldog-type coat, it will shed moderately. Coat type cannot be reliably predicted at birth.

What health issues might a Bull Tzu inherit?

The most significant shared risk is Brachycephalic Obstructive Airway Syndrome (BOAS), which affects breathing. Other concerns include hip dysplasia, eye conditions (cherry eye, corneal ulcers, entropion), patellar luxation, skin allergies, and dental overcrowding. Always consult your veterinarian for a breed-appropriate screening schedule.

How much does a Bulldog and Shih Tzu mix cost?

Expect to pay $800–$1,500 from a reputable hobby breeder, or $1,500–$2,500 from a premium designer breed program. Rescue adoption fees typically range from $150–$450. First-year ownership costs add approximately $1,800–$3,500 for veterinary care, supplies, and grooming.

Can Bull Tzus live in hot climates?

They can, but only with strict precautions. Brachycephalic dogs overheat rapidly. Air conditioning is non-negotiable. Walk only during early morning or late evening, provide cooling mats, and never leave a Bull Tzu outdoors in temperatures above 80°F (27°C). Watch for excessive panting, blue gums, or collapse — these are emergencies.