Health

Cairn Terriers shed very little, but always should be hand-stripped. Using scissors or shears can ruin the dog's rugged outer coat after one grooming. Hand-stripping involves pulling the old dead hair out by the roots. If done incorrectly, this can cause discomfort to the dog, causing it to shy away from future hand-stripping. Removing the dead hair in this manner allows new growth to come in. This new growth helps protect the dog from water and dirt.

Cairn Terrier ancestors are from Scotland, where the wire coat repels water and keeps the dog dry even in rainy or damp climates. Keeping the Cairn Terrier coat in its original state will prevent possible skin irritations. As dead hair is removed by stripping the coat, new growth comes in, and the skin and coat remain healthy. Clipper-cutting a Cairn might destroy the protective wire coat unique to this breed.

It is wise to have a pet examined to rule out heritable skin diseases when a Cairn is obtained from unknown sources (i.e. pet stores, rescues, or puppy mills).

Breeders, owners, and veterinarians have identified several health problems that are significant for Cairns. Some of these diseases are hereditary, and others occur as a result of nonspecific factors (e.g., infections, toxins, injuries, or advanced age).

Currently, the Cairn Terrier Club of America, along with the Institute for Genetic Disease Control in Animals, maintains an open registry for Cairn Terriers in hopes of reducing the occurrence of hereditary diseases within the breed. Breeders voluntarily submit their dogs' test results for research purposes as well as for use by individuals who seek to make sound breeding decisions.

Some of the more common hereditary health problems found in the Cairn are:

Bronchoesophageal fistula

Cataracts

Corneal dystrophy

Craniomandibular osteopathy (lion jaw)

Diabetes mellitus

Entropion

Hip dysplasia

Hypothyroidism

Krabbe disease (globoid cell leukodystrophy)

Legg–Calvé–Perthes disease

Lens luxation

Luxating patella

Ocular melanosis

Portosystemic shunt

Progressive retinal atrophy

Soft-tissue sarcoma

Von Willebrand disease

These dogs are generally healthy and live on average about 12 to 17 years.

Health

Heart Disease
Shih tzu's are prone to multiple types of heart disease. The condition may have a poor prognosis depending on when it is diagnosed and the stage of the disease when it is discovered.

Brachycephaly
Due to the ideal of beauty regarding the shape of the face the skull malformation brachycephaly was increased by breeding selection. This short nose causes problems like skin sensitivities such as dermatitis, bumps, and rashes.

Eye issues
It is very common for Shih Tzu's to develop eye problems at any age, and even more so once they are older. Most veterinarians will recommend eye drops to assist with any eye irritations. Some dogs have allergies which causes excess discharge around the eye. Older Shih Tzu are known to develop cataracts which can be corrected with surgery. If not treated, the dog may become blind in the eye that has the cataract. The distinctive large eyes can easily be scratched which may cause an ulcer. The dog will normally have the injured eye closed or half closed and may have excessive tears. The most common problem of Shih Tzus concerning eye conditions is the formation of epiphora caused by the fur on the eyelids scratching the conjunctiva and the cornea. However this can be mediated by the application of prescribed eye drops from a veterinarian.

Hair issues
Untrimmed hair can be an issue. This is remedied with a top knot or a short puppy cut. Shih Tzus have hair which can grow lengthy. Long hair is required as a show coat and is required generally to be brushed or groomed once a day. Hair longer than a puppy cut often causes issues, including hair covering the eyes of the dog, preventing good visual acuity.

Ear issues
A very common issue for Shih Tzu's is the development of ear infections, as they have a long coat and hair grows in their ears. If ears are not plucked and cleaned often, ear infections will reoccur and need to be treated with ear cleaner and possibly medication, prescribed by the veterinarian. Ear infections may be spotted by an odor coming from the ears, as well as frequent shaking of the head and scratching of the ears.

Skin sensitivities
The Shih Tzu's skin is particularly sensitive and prone to allergies. Ideally, they should be bathed every two to six months to maintain hygiene and prevent skin irritations. They are also prone to stomach issues, and most have delicate appetites.