Health
US owner surveys put the average lifespan of a Westie at 12 to 16 years, and some beyond that; while the average litter size is between three and five puppies. However some litters may contain more than this, one of which was a Westie called Isobel who gave birth to a litter of eleven puppies in April 2012.
The breed is predisposed to conditions found in many breeds, such as abdominal hernias. Westie puppies may be affected by Craniomandibular osteopathy, a disease also known "lion jaw", and is sometimes also referred to as "westie jaw". The disease is an autosomal recessive condition and so a puppy can only be affected by it if both its parents are carriers of the faulty gene. The condition appears across many breeds, including several different types of terrier, as well as other unrelated breeds such as the Great Dane. It typically appears in dogs under a year old, and can cause problems for the dog to chew or swallow food. Radiographic testing can be conducted to diagnose the condition, in which the bones around the jaw thicken; additionally the blood may show increased calcium levels and enzyme levels. The condition often stops progressing by the time the dog is a year old, and in some cases can recede. It is normally treated with anti-inflammatory medications, and the feeding of soft foods. In some cases, tube feeding may be necessary. However, if the animal still cannot eat and is in uncontrolled pain, then euthanasia may be the only medical option remaining.
The breed is prone to skin disorders. About a quarter of Westies surveyed are affected by atopic dermatitis, a heritable chronic allergic skin condition. A higher proportion of males are affected compared to females. There is an uncommon but severe breed-specific skin condition that may affect West Highland White Terriers affecting both juveniles and adults dogs. This condition is called Hyperplastic Dermatosis. Affected dogs can suffer from red hyperpigmentation, lichenification and hair loss. In the initial stages, this condition can be misdiagnosed as allergies or less serious forms of dermatitis.
An inherited genetic problem that exists in the breed is globoid cell leukodystrophy. It is not breed specific, and can appear in Cairn Terriers and other breeds including Beagles and Pomeranians. It is a neurological disease where the dog lacks an enzyme called galactosylceramidase. The symptoms are noticeable as the puppy develops, and can be identified by the age of 30 weeks. Affected dogs will have tremors, muscle weakness, and trouble walking. Symptoms will slowly increase until limb paralysis begins to occur. Due to it being a hereditary condition, it is recommended for owners to avoid breeding affected animals in order to eliminate it from the breed. Another genetic condition that affects the breed is "White dog shaker syndrome". As this condition is most commonly found in Westies and in Maltese, the condition was originally thought to be connected to the genes for white coats, however the same condition has since been found in other non-white breeds including the Yorkshire Terrier and the Dachshund. The condition typically develops over one to three days resulting in tremors of the head and limbs, ataxia and hypermetria. Affected males and females can be affected for different lengths of time, with symptoms in females lasting for between four to six weeks, while males can be affected the rest of its life.
Other less common conditions which appear in the breed include hydroxyglutaric aciduria, which is where there are elevated levels of alpha-Hydroxyglutaric acid in the dog's urine, blood plasma, and spinal fluid. It can cause seizures, muscle stiffness, and ataxia, but is more commonly found in Staffordshire Bull Terriers. A degeneration of the hip-joint, known as Legg–Calvé–Perthes syndrome also occurs to the breed. However the chances of this condition occurring are much higher in some other breeds, such as the Australian Shepherd or the Miniature Pincher. The breed is also one of the least likely to be affected by a luxating patella, where the knee cap slips out of place.
Read more about this topic: West Highland White Terrier
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