The Shih Tzu is an affectionate, sturdy toy breed known for longevity, often living 10 to 16 years. However, their compact brachycephalic skull, prominent eyes, and long spinal structure make them prone to specific hereditary and anatomical health vulnerabilities.
Quick Answer: Shih Tzus are generally robust toy dogs with an average lifespan of 10 to 16 years, but their unique anatomy predisposes them to brachycephalic airway syndrome, ocular conditions (corneal ulcers, dry eye), dental overcrowding, and orthopedic issues like patellar luxation and intervertebral disc disease (IVDD). Early screening and proactive weight management significantly mitigate these risks.
1. Respiratory Health & Brachycephalic Airway Syndrome (BOAS)
Because Shih Tzus are a brachycephalic (flat-faced) breed, the soft tissues in their nose and throat are compressed into a shortened facial skeleton. This unique anatomy frequently causes varying degrees of Brachycephalic Obstructive Airway Syndrome (BOAS).
Key anatomical components of BOAS in Shih Tzus include:
- Stenotic Nares: Pinched or abnormally narrow nostrils that restrict airflow during inhalation.
- Elongated Soft Palate: The soft tissue roof of the mouth extends too far back into the throat, partially obstructing the entrance to the trachea (windpipe).
- Everted Laryngeal Saccules: Small pouches inside the larynx that turn inside-out due to increased respiratory effort, further narrowing the airway.
- Hypoplastic Trachea: A windpipe with a narrower diameter than normal.
Management & Precautions: Dogs with BOAS are extremely vulnerable to heatstroke because dogs cool themselves primarily through panting. Never exercise a Shih Tzu in hot or humid weather. Always walk your dog using a well-fitted chest harness rather than a neck collar, which places direct pressure on the delicate trachea.
2. Ocular Conditions and Eye Care
The Shih Tzu’s skull features shallow eye sockets (orbits), leaving their large, prominent eyes vulnerable to trauma and chronic exposure.
Corneal Ulcers
Because their eyes bulge slightly, Shih Tzus frequently scratch their corneas on low bushes, carpet fibers, or coarse facial hairs. Corneal scratches can rapidly progress to deep bacterial ulcers within 24 to 48 hours. Symptoms include squinting, excessive tearing, cloudiness, or a bluish haze over the eye. This is an immediate veterinary emergency.
Keratoconjunctivitis Sicca (KCS / Dry Eye)
KCS occurs when immune-mediated destruction of the lacrimal glands stops normal tear production. The eye produces a thick, sticky yellow or green mucus discharge. Without lifelong daily prescription lubricating drops (such as cyclosporine or tacrolimus), painful corneal scarring and permanent blindness can result.
Progressive Retinal Atrophy (PRA) and Cataracts
PRA is an inherited degenerative disorder of the retina leading to progressive night blindness followed by complete vision loss. Juvenile and senile cataracts are also common and can be surgically addressed by a veterinary ophthalmologist.
3. Orthopedic and Spinal Disorders
The Shih Tzu’s elongated back and short legs (chondrodysplastic conformation) place abnormal physical stress on their joints and spinal column.
Patellar Luxation
Patellar luxation occurs when the kneecap slips out of its normal femoral groove. It is graded from Grade I (mild, easily slips back) to Grade IV (permanently dislocated, causing lameness and severe arthritis). Maintaining a lean body weight reduces strain on the knee joints, while advanced cases require surgical correction.
Intervertebral Disc Disease (IVDD)
Shih Tzus are predisposed to Type I disc herniation, where the cushioned intervertebral discs between the spinal vertebrae calcify, lose elasticity, and rupture into the spinal canal. Symptoms range from a hunched posture and reluctance to move to severe spinal pain and sudden hind-leg paralysis. Prevent IVDD by training your Shih Tzu to use pet ramps rather than jumping off couches or beds.
Hip Dysplasia
Although more common in large breeds, hip dysplasia frequently affects toy breeds, leading to joint laxity, abnormal wear of the ball-and-socket joint, and chronic hind-end stiffness.
4. Dental Overcrowding and Periodontal Disease
Shih Tzus have an undershot jaw (the lower teeth bite outside the upper teeth) and must fit the standard 42 adult canine teeth into a significantly foreshortened jawline. This compression results in severe tooth rotation, misalignment, and food impaction.
Without daily dental intervention, bacteria and plaque mineralize into tartar beneath the gumline, leading to periodontal disease, systemic organ damage (heart and kidney infections), bone loss, and premature tooth loss. Implement daily enzymatic tooth brushing, provide approved dental chews, and schedule professional veterinary cleanings under anesthesia annually starting in early adulthood.
5. Skin Allergies, Ear Infections & Coat Health
Shih Tzus possess sensitive skin that easily succumbs to Atopic Dermatitis triggered by environmental allergens (pollen, dust mites) or dietary proteins. Frequent scratching and licking lead to secondary fungal (Malassezia yeast) and bacterial infections.
Additionally, their drop ears create a warm, dark, and humid ear canal with poor air circulation. Hair growing inside the ear canal traps moisture and debris. Regular hygiene is critical: use our hair length dog grooming blade chart to safely trim hair around the ear base and paw pads with appropriate blade sizes (such as #10 or #15 blades) to ensure proper ventilation and prevent fungal dermatitis.
6. Senior Care & Age-Related Conditions
As Shih Tzus advance into their senior years, their metabolic and systemic health changes. Common geriatric conditions include:
- Mitral Valve Disease (MVD): Degenerative heart valve disease leading to heart murmurs, coughing, and congestive heart failure.
- Chronic Kidney Disease: Gradual decline in renal filtration capacity, often beginning with increased thirst and urination.
- Cognitive Dysfunction Syndrome (CDS): Canine dementia causing disorientation, pacing, changes in sleep cycles, and house soiling.
Use our Shih Tzu age in human years calculator to track when your dog reaches geriatric milestones (typically around 8 to 9 chronological years) so you can transition to bi-annual veterinary wellness exams, baseline blood chemistries, and early cardiac screenings.
Essential Preventive Care Protocol
Proactive preventative care dramatically reduces the incidence and severity of congenital Shih Tzu conditions:
- Weight Optimization: Keep your Shih Tzu at their ideal body condition score (BCS 4–5 out of 9). Every extra pound exacerbates respiratory restriction, patellar luxation, and spinal disc compression.
- Harness Walking Only: Completely eliminate neck collars for walking to safeguard the trachea from collapse.
- Ramp Training: Equip your living space with pet stairs or ramps for furniture access to protect spinal discs from concussive jumping injuries.
- Daily Facial Hygiene: Wipe eye discharge daily using sterile saline and a soft lint-free pad to prevent tear staining, corneal friction, and skin fold pyoderma.
Veterinary Disclaimer: This article is for informational purposes only and does not constitute veterinary medical diagnosis or treatment. Canine health standards align with the American Kennel Club (AKC). If your Shih Tzu exhibits respiratory distress (blue gums, gasping), acute ocular pain, or sudden mobility loss, seek immediate evaluation from a licensed veterinarian or a board-certified specialist through the American College of Veterinary Internal Medicine (ACVIM).
Frequently Asked Questions
What is the leading cause of death in Shih Tzus?
The most common causes of mortality in senior Shih Tzus are cardiovascular conditions (congestive heart failure resulting from mitral valve disease), chronic kidney failure, and cancer. Regular senior bloodwork and cardiac auscultation during routine vet visits facilitate early medical intervention.
Can Shih Tzus fly on commercial airplanes?
Due to their brachycephalic skull structure, Shih Tzus are at high risk of respiratory distress and heatstroke in cargo holds; most major airlines ban brachycephalic breeds from cargo transit. However, most adult Shih Tzus fit comfortably within standard airline-compliant carriers for in-cabin travel under the seat in front of you.
How do I know if my Shih Tzu has an eye ulcer?
Signs of a corneal ulcer include sudden squinting, holding one eye closed, excessive watery or mucous discharge, sensitivity to bright light, cloudiness or a divot on the eye surface, and pawing at the face. Because ulcers can perforate rapidly, visit a veterinarian within 24 hours.
Are male or female Shih Tzus healthier?
Overall breed health risks (BOAS, IVDD, ocular issues, and patellar luxation) are distributed equally between males and females. Spaying and neutering eliminate reproductive cancers (uterine infections, testicular tumors) and significantly reduce mammary tumor risks regardless of sex.
