Shih Tzu

Snapshot

The Shih Tzu is among the most ancient companion dogs on earth, genomically confirmed as one of the breeds least diverged from the wolf (Parker et al., Science, 2004), and one of the few breeds whose entire history — from Tibetan monastery to Chinese imperial palace to tropical regions apartment — has been defined by a single purpose: living as a cherished human companion. It is affectionate, adaptable, and well-suited to apartment life. It is also a brachycephalic (flat-faced) breed carrying a documented BOAS prevalence of approximately 58% in clinical assessments (Liu et al., PLOS One, 2017), a lifespan of roughly 13.2 years (RVC VetCompass data), and a health burden concentrated in the airway, eye, kidney, teeth, and skin. The honest summary is that the Shih Tzu makes a superb companion for owners who understand and plan for those costs — and that in year-round tropical heat, the brachycephalic airway risk is not a footnote but the single most important welfare issue this breed faces.

Origin & history

The genomic evidence for the Shih Tzu's antiquity is unusually strong. Parker et al. (Science, 2004) analysed microsatellite markers across 85 domestic dog breeds and identified a cluster of 14 "ancient breeds" whose genomes showed the least divergence from the wolf — reflecting domestication or genetic isolation in Asia well before modern Western selective breeding began. The Shih Tzu clustered in this ancient group alongside the Pekingese, Lhasa Apso, Shar Pei, and Chow Chow, consistent with a shared origin in ancient China or Tibet that predates the 19th-century European kennel-club era by centuries. Morphological and documentary evidence points to Tibet as the probable proximate source: small, lion-like dogs were kept in Tibetan monasteries and regarded as sacred animals embodying the Buddhist snow lion. It is generally accepted that Tibetan lamas periodically gifted these dogs to the emperors of the Chinese imperial court in Beijing, where they were crossed with Chinese palace dogs — probably including the Pekingese — to produce the distinct Chinese type that became the Shih Tzu.

Temperament & behaviour

The Morrill et al. (Science, 2022) genomic and survey study of over 18,000 dogs across 128 breeds — the largest of its kind — found that breed ancestry explains only approximately 9% of individual behavioural variation. This is not a peripheral finding: it means that for any given Shih Tzu, the remaining 91% of its personality is explained by individual genetic variation within the litter, early socialisation during the critical window (weeks 3–12), rearing environment, and owner interaction. Breed-level behavioural descriptions are therefore accurate as probabilistic tendencies across populations, not guarantees for any individual. Every Shih Tzu still requires the same investment in socialisation, reward-based training, and consistent handling as any other breed.

Within that context: Shih Tzus are widely described as affectionate, playful, confident, and people-oriented. They tend to be sociable with strangers once introduced, though some individuals are reserved with unfamiliar people and benefit from continued adult socialisation. Multi-pet households generally work well: most Shih Tzus coexist comfortably with cats and other small dogs, particularly when reared alongside them. The breed's deep historical attachment to humans does carry a genuine risk of separation anxiety; Shih Tzus left alone for extended periods can develop distress vocalisations and destructive behaviours that are much harder to resolve than prevent. Crate training from puppyhood, combined with graduated alone-time practice, is the most evidence-supported approach to preventing separation-related distress.

Exercise needs are moderate. A Shih Tzu does not require long runs. Two 15–20 minute walks daily (in the cool of the day) plus indoor play generally satisfies this breed's physical and mental requirements. They enjoy puzzle feeders and short training sessions, but marathon exercise is neither needed nor, given their brachycephalic anatomy, advisable.

Two patterns deserve specific attention. The first is small-dog syndrome — a cluster of behaviours (resource guarding, snapping at other dogs, ignoring recall) that emerge not from any heritable Shih Tzu trait but from well-meaning owners excusing misbehaviour in small dogs that would not be tolerated in a Labrador. The science here is consistent: permissive handling that ignores unwanted behaviour is the proximate cause, not the breed. The second is nuisance barking. Shih Tzus are not naturally high-barking breeds, but they learn quickly that barking produces owner attention. Ignoring demand barks every single time, and reinforcing quiet with positive attention, is the evidence-aligned approach. Alarm barking at strangers or sounds is more deeply wired and requires systematic desensitisation, beginning with controlled exposure at sub-threshold distances.

Training

Shih Tzus are receptive to reward-based training. They hold attention for short sessions — three to five minutes is more productive than twenty — and respond to high-value reinforcers such as small food morsels or brief play. The breed stubbornness is less about defiance than a rapid cost-benefit analysis: if the reward is not worth the effort, the Shih Tzu will find something more interesting to do. Increasing reinforcement value, shortening sessions, and ending on success are more reliable than repeating a command a fourth time. Foundation behaviours — sit, down, stay, come, leave it, loose-leash walking — should be established before 16 weeks wherever possible, while the critical socialisation window is still open.

Housetraining characteristically takes longer in Shih Tzus than in many other breeds. The reasons are probably anatomical (small bladder capacity — 1–2 hours maximum in young puppies) and attentional (toy breeds are often carried or managed indoors in ways that limit outdoor-toilet associations). A strict cue-based schedule — outside immediately after waking, after eating, after play, and every 90 minutes otherwise — combined with crate confinement when unsupervised, outperforms open-freedom methods. Any trainer promoting prong collars, choke chains, alpha-rollover, or shock/e-collar corrections should be avoided; these approaches are not supported by current canine behaviour science (Ziv, Journal of Veterinary Behavior, 2017).

Exercise & enrichment

Exercise needs are modest. Two walks of 15–20 minutes each, supplemented by indoor play and brief training sessions, satisfies a healthy adult Shih Tzu physically and mentally under temperate conditions. The ceiling is set by anatomy: brachycephalic airways generate substantially more respiratory resistance than a mesocephalic breed — panting is inefficient, heat dissipation is impaired, and prolonged aerobic effort risks progressive airway oedema. In urban settings (ambient 28–34 °C year-round, humidity 70–90%), this ceiling drops sharply. The BOAS Research Group at Cambridge demonstrated that exercise intolerance is the first clinical sign in Grade 1 BOAS dogs, long before owners perceive anything wrong. Erring toward under-exercise rather than over-exercise is the right position in a tropical climate.

Mental enrichment is disproportionately important relative to the modest physical needs. Puzzle feeders, scent-work games, brief training refreshers, and novel-object exploration provide cognitive stimulation that reduces boredom-related barking and destructive behaviour. Social enrichment — time with familiar people, supervised interactions with other known dogs — is particularly meaningful for a breed shaped over centuries specifically to be human companions. A Shih Tzu isolated for nine hours while owners work will not thrive regardless of how much it is walked on weekends.

Grooming

The Shih Tzu double coat is the breed most demanding husbandry requirement. The undercoat is soft and dense; the outer coat is long, silky, and continuous-growing — it never reaches a terminal length. In a full show coat the dog must be line-brushed daily with a pin brush and wide-toothed steel comb, working in sections from the skin outward, to prevent tangles from compacting into mats. Most tropical climate pet owners opt for a puppy (utility) clip — trimmed to 2–4 cm all over — which reduces home brushing to three times per week and requires a professional groom every 6–8 weeks. A puppy clip is a legitimate, welfare-positive choice: it reduces heat burden in hot, humid climates and drastically cuts grooming time without compromise to the dog health or temperament.

Beyond the coat, three daily or near-daily tasks require particular attention. First, facial fold cleaning: the skin folds framing the muzzle are chronically moist, warm, and occluded — in hot, humid climates humidity, bacterial and yeast overgrowth (fold pyoderma) can progress from subclinical to painful in as little as 48–72 hours. Wipe folds with an unscented baby wipe or vet-recommended antiseptic wipe, then dry thoroughly. Second, periocular hygiene: eye discharge accumulates and, if allowed to dry, forms crusts that can track infection into the eye — remove daily with a damp cotton pad. Third, tooth brushing: the brachycephalic jaw concentrates tooth roots in a compressed arc, accelerating plaque accumulation. Lund et al. (Preventive Veterinary Medicine, 1999) documented periodontal disease as the most common diagnosis across all breeds; the shortened jaw makes Shih Tzus especially vulnerable. Daily brushing with dog-specific enzymatic toothpaste — never human fluoride toothpaste — combined with annual professional scaling from age 1–2, significantly reduces periodontal disease progression.

Nutrition & feeding

Adult Shih Tzus — typically 4–7 kg — need approximately 150–280 kcal per day for a healthy desexed adult, depending on body weight and activity level (National Research Council, Nutrient Requirements of Dogs, 2006). Small-breed-specific kibble offers higher caloric density per gram (accommodating the smaller stomach capacity) and smaller pieces suited to the shortened jaw and smaller teeth. Any diet should carry the AAFCO nutritional adequacy statement and, ideally, be produced by a manufacturer that complies with WSAVA nutritional guideline criteria — employing a board-certified veterinary nutritionist (DACVN or DECVCN) and conducting formal feeding trials. Twice-daily feeding is preferable to free-feeding; it structures caloric intake and facilitates early detection of appetite changes.

Obesity management is not optional in a brachycephalic breed. Liu et al. (PLOS One, 2017) and the Cambridge BOAS Research Group independently identified overweight body condition as a significant independent risk factor for BOAS severity — the excess adipose tissue around the neck and pharynx physically narrows the upper airway. A body condition score (BCS) of 4–5 out of 9 (Purina scale) is the target: ribs easily palpable but not visible, a visible waist taper from above, a slight abdominal tuck. A BCS of 6–7 — common in overfed Shih Tzus — is a BOAS risk factor, not merely cosmetic. Treats should constitute no more than 10% of total daily calories. Fresh water must be available at all times; in hot weather, check and refresh bowls frequently.

Health & longevity

The RVC VetCompass programme — which analyses anonymised primary-care clinical records from participating UK practices — reported a median lifespan of approximately 13.2 years for Shih Tzus (O'Neill et al., Veterinary Record, 2013 and ongoing surveillance). This places the Shih Tzu among the longer-lived of small breeds, but longevity statistics can mask substantial morbidity: the same VetCompass data identify respiratory conditions (BOAS and its sequelae), eye disease, dental disease, and skin conditions as the dominant health burdens across the breed life. A long-lived Shih Tzu is achievable — but it requires active, informed management of these predictable conditions, not passive optimism.

Choosing a breeder

The decision of whom to buy a Shih Tzu from directly determines which health conditions the dog is predisposed to. Reputable breeders health-screen both parents before breeding: BOAS functional grading (Grade 0 or 1 on the Cambridge scale), eye examination by a board-certified veterinary ophthalmologist (OFA Eye Certification or equivalent ECVO examination), and hip evaluation (OFA or PennHIP). They will share these clearance certificates before a deposit is taken, raise litters in their home, allow puppy visits to meet the dam in person, and will not release puppies before 8 weeks of age. The national kennel club maintains a register of member breeders and a code of ethics; it is a starting point, not a guarantee, and independent verification of health-screening claims is essential.

Adoption is a legitimate and rewarding alternative. Shih Tzus appear in local SPCAs and breed-specific rescue networks — primarily as owner surrenders. An adult rescue Shih Tzu offers a fully known temperament and often some basic training; a reputable rescue will provide veterinary history, disclose health conditions honestly, and follow up after adoption. The question to prioritise above price, coat colour, or proximity is: Have both parents been BOAS-graded and eye-certified? A breeder who cannot answer that question confidently — or who charges a premium for a more extreme, flatter face — is a signal to walk away.