The term Fox Terrier refers to two different terrier dog breeds. One of the breeds is called Smooth Fox Terrier and the other one is called Wire Fox Terrier. Both breeds have originated in England in the 19th century from a small number of British terrier breed dogs. The Fox Terrier breed has also given rise to other breeds that have diverged from these two breeds such as Jack Russell Terrier (JRT), Miniature Fox Terrier and Rat Terrier, all of which have diverged from Fox Terriers.
The Fox Terrier dogs, although divided into two different breeds, Smooth and Wire, have same characteristics and only differ in coat and colouring. The smooth Fox Terrier has short and hard, predominantly white coat while the Wire Fox Terrier has a hard and crisp double coat with coarse and dense undercoat that provides protection from cold weather. Individual hair can be wavy but overall coat is not curly. Both breeds range from 14-15.5 inches in height and weighs between 15-19lbs. Both breeds have long and wedge shaped head with small eyes and v-shaped ears.