The Chinese Crested Dog is generally a healthy breed with an impressive lifespan of 13 to 18 years, placing it among the longer-lived toy breeds. However, several conditions appear at elevated rates in the breed and deserve informed attention from owners and breeders alike. The most significant health concerns cluster around three areas: eye diseases, orthopedic conditions, and the skin and dental issues directly linked to the hairlessness gene. Understanding these vulnerabilities allows for effective preventive care, early detection, and informed breeding decisions that improve outcomes for individual dogs and the breed as a whole.
Eye diseases represent the most serious inherited health challenge in the Chinese Crested. Primary lens luxation, caused by an autosomal recessive mutation of the ADAMTS17 gene, occurs at a higher rate in this breed than in most others. In PLL, the fibers that hold the lens in position degenerate, allowing the lens to shift forward or backward in the eye. The condition is painful, develops rapidly, and can lead to secondary glaucoma and blindness if not treated promptly with surgery. Progressive retinal atrophy, present in at least two genetically distinct forms in the breed, causes slow, irreversible degeneration of the retinal photoreceptor cells and eventual blindness. DNA tests exist for PLL and for one form of PRA (prcd-PRA), enabling breeders to identify carriers and make informed breeding decisions. However, because the DNA tests do not cover all forms of PRA present in the breed, annual ophthalmologic examinations by a board-certified veterinary ophthalmologist remain essential regardless of genetic test results. The breed also experiences keratoconjunctivitis sicca, or dry eye, at notable frequency.
Orthopedic conditions common in the breed include patellar luxation and Legg-Calve-Perthes disease, both of which affect toy breeds disproportionately. Patellar luxation involves displacement of the kneecap from its normal groove, producing intermittent limping, a skipping gait, or chronic lameness depending on the grade of severity. Legg-Calve-Perthes disease causes avascular necrosis of the femoral head, typically appearing in puppies between five and eight months of age, with signs including progressive hind-limb lameness and muscle wasting. Both conditions can be screened for through veterinary examination, and both may require surgical correction in moderate to severe cases.
The dental abnormalities of the Hairless variety merit particular attention because they are genetically linked to the hairlessness trait itself rather than being incidental to small size. The dominant hairlessness gene that produces the Hairless phenotype also affects tooth development, resulting in fewer teeth, abnormally shaped teeth that may be peg-like or forward-sloping, and early loss of teeth that would otherwise remain functional. Many Hairless Cresteds lose a significant portion of their teeth by age two or three. This is not a consequence of poor care but a genetic inevitability that owners should prepare for. Daily dental care starting in puppyhood can slow the progression of periodontal disease, and dietary adjustments such as softened or canned food may be necessary as teeth are lost. The Powderpuff variety has normal dentition for a toy breed but remains vulnerable to the periodontal disease that affects small dogs generally.
Additional health concerns include congenital deafness, which can be confirmed through BAER testing, and various skin conditions in the Hairless variety including acne, comedones, sunburn, and allergic dermatitis. The breed may also develop hypothyroidism and idiopathic epilepsy at rates somewhat above the general canine population. Responsible breeders use the available health screening tools including CHIC-required eye, patella, and cardiac evaluations along with optional DNA tests for PLL and PRA and BAER testing for deafness to minimize the transmission of inherited conditions to future generations.
Common Health Issues
- Primary lens luxation (PLL) - An inherited eye condition caused by an autosomal recessive mutation of the ADAMTS17 gene in which the fibers supporting the lens break down, causing the lens to dislocate. The Chinese Crested has a higher incidence of PLL than most breeds. The condition is painful, progresses rapidly, and can lead to blindness and secondary glaucoma if untreated. A DNA test is available to identify clear, carrier, and affected dogs.
- Progressive retinal atrophy (PRA) - A group of inherited diseases causing gradual degeneration of the retinal photoreceptor cells, leading to progressive vision loss and eventual blindness. At least two forms of PRA affect the Chinese Crested. A DNA test exists for one form (prcd-PRA), but because the test does not cover all forms, regular ophthalmologic examinations remain necessary even for genetically tested dogs.
- Patellar luxation - A common orthopedic condition in toy breeds where the kneecap slips out of its normal groove, causing intermittent lameness, skipping gait, or chronic pain depending on severity. Onset can occur at a young age. Grading ranges from I (mild, intermittent) to IV (permanent dislocation with skeletal deformity). Surgical correction may be required in moderate to severe cases.
- Legg-Calve-Perthes disease - Avascular necrosis of the femoral head in which reduced blood supply causes the top of the thighbone to deteriorate, resulting in hip pain, limping, and muscle wasting in the affected leg. The condition typically appears in puppies between five and eight months of age. Surgical removal of the damaged femoral head generally produces good functional outcomes in small breeds.
- Dental disease and tooth abnormalities - The Hairless variety has a genetic link between the hairlessness gene and dental development that results in fewer teeth, peg-shaped or forward-sloping teeth, and early tooth loss. Many Hairless Cresteds lose a significant number of teeth by age two or three. The Powderpuff variety has normal toy breed dentition but remains susceptible to periodontal disease common in small breeds.
- Keratoconjunctivitis sicca (dry eye) - Insufficient tear production that leaves the corneal surface inadequately lubricated, causing irritation, redness, mucoid discharge, and potential corneal ulceration. The condition requires lifelong management with topical cyclosporine or tacrolimus to stimulate tear production and artificial tear supplements to maintain ocular surface health.
- Congenital deafness - Some Chinese Crested puppies are born with partial or complete hearing loss that can be confirmed through brainstem auditory evoked response (BAER) testing. Deaf dogs can live full, happy lives with modified training approaches including hand signals and vibration-based cues, but breeders should BAER test their stock to make informed breeding decisions.
- Skin conditions (Hairless variety) - The exposed skin of the Hairless variety is susceptible to acne, blackheads (comedones), sunburn, dry skin, and allergic reactions that a protective coat would normally buffer. Regular bathing, appropriate moisturizing, and sun protection are essential preventive measures. Some Hairless Cresteds develop contact allergies to fabrics, detergents, or grooming products that require identification and avoidance of the triggering substance.
Preventive Care & Health Monitoring
- CERF or OFA CAER eye examination by a board-certified veterinary ophthalmologist - Required CHIC test. Annual examinations detect early signs of PRA, PLL, dry eye, and other ocular conditions. Regular screening is critical given the breed's elevated risk for multiple eye diseases.
- OFA patellar luxation evaluation - Required CHIC test. Veterinary examination of knee joint stability with results registered with OFA. Should be performed on all breeding stock and recommended for pet dogs to catch early-stage luxation before clinical lameness develops.
- OFA cardiac evaluation - Required CHIC test. Auscultation by a veterinarian or board-certified cardiologist to screen for congenital heart defects. Results are registered with OFA.
- DNA test for primary lens luxation (PLL) - Optional CHIC test but strongly recommended. Identifies clear, carrier, and affected dogs using a validated assay for the ADAMTS17 gene mutation. Essential for responsible breeding decisions.
- DNA test for progressive retinal atrophy (prcd-PRA) - Optional CHIC test but strongly recommended. Identifies genetic status for one form of PRA. Because the test does not cover all PRA forms in the breed, it should be used alongside regular ophthalmologic examinations rather than as a standalone screening tool.
- BAER hearing test - Optional CHIC test. Brainstem auditory evoked response testing confirms hearing status in puppies and breeding dogs. Particularly valuable for breeders to identify carriers of congenital deafness and make informed pairing decisions.
- Daily dental care and professional dental cleanings - Daily tooth brushing is essential given the breed's high susceptibility to dental disease. Professional veterinary dental cleanings should be scheduled as recommended by the veterinarian, often annually or more frequently for Hairless Cresteds with abnormal dentition.
- Sun protection for Hairless variety - Apply pet-safe sunscreen to exposed skin before outdoor activity and limit direct sun exposure during peak hours. Protective clothing can provide additional coverage during walks and outdoor play.