The life expectancy of the West Highland White Terrier is around 11-14 years, and there are a number of health problems to look out for with this breed. This includes Legg-Perthes, cataracts, CMO, vWD, seizures, allergies, and luxating patella. The parents of the West Highland White Terrier puppy should have OFA and CERF certificates. They should also be screened for GDC and luxating patella.