Wikipedia
The West Highland White Terrier, commonly known as the Westie or Westy, is a Scottish breed of dog with a distinctive white coat. The modern breed is descended from a number of breeding programs of white terriers in Scotland prior to the 20th century. Edward Donald Malcolm, 16th Laird of Poltalloch, is credited with the creation of the modern breed from his Poltalloch Terrier, but did not want to be known as such.
Other related breeds included George Campbell, 8th Duke of Argyll's Roseneath Terrier and Dr. Americ Edwin Flaxman's Pittenweem Terriers. This breed of small white Scottish terriers was given its modern name for the first time in 1908, with recognition by major kennel clubs occurring around the same time.
The breed remains very popular in the UK, twice winner at Cruft's, and is in the top third of all breeds in the US since the 1960s. It has been featured in television and film, including in Hamish Macbeth and in advertising by companies such as Cesar dog food and Scottish whisky Black & White. It is a medium-sized terrier, although with longer legs than other Scottish breeds of terrier. It has a white double coat of fur which fills out the dog's face, giving it a rounded appearance. The breed can be good with children, but does not always tolerate rough handling. The Westie is an active and intelligent breed, and is social with a high prey drive, as they were once used to hunt rodents.
Several breed-specific and nonspecific health issues appear in the breed, including a condition in young dogs nicknamed " westie jaw" which causes an overgrowth of bone in the jaw of the dog. It can also be prone to skin disorders, with a breed-specific condition called hyperplastic dermatosis occurring. They are very energetic and need plenty of exercise. Cousin to the Cairn Terrier, the Westie was bred to hunt small rodents at places such as farms.