The English Toy Terrier (Black and Tan) is a small breed of terrier in the toy dog group. While the name is sometimes used synonymously with that of the Toy Manchester Terrier, these are actually separate breeds.
The English Toy Terrier (ETT) developed from the Manchester Terrier and other small breeds of sporting terrier including the now extinct English Black and Tan Terrier. Its origin is in the world of the rat pit, a sport popular in the cities of Victorian England where terriers were placed in a circle or pit with a number of rats and bets were taken as to which dog would kill its quota of rats in the fastest time. Small dogs were highly prized with the ideal being to produce the smallest dog still capable of killing its quota of rats in as short a time as possible.
When this sport was made illegal in England the ETT survived as a companion dog and a show dog. It is considered a Toy Dog (not a Terrier) for show purposes but has never gained anything like the popularity of other toy breeds such as the Chihuahua, although they do share common characteristics in their body figure.