Which breed of dog is shown in the picture?

Although looks suggest a miniature Dobermann or a large Miniature Pinscher, the Manchester Terrier is the breed shown.

In Canada and the U.S. their Kennel Clubs recognise the Toy Manchester Terrier as a variant of the same breed, while the "Toy" is considered to be a separate breed by the British Kennel Club and is called the English Toy Terrier (Black & Tan). Although they vary in size, the larger Manchester Terrier and the English Toy Terrier have similar overall appearances.

Many people think by their appearances that Manchester Terriers are small versions of the Dobermann. The Dobermann is, however, a combination of several breeds, including the Beauceron, German Pinscher, Rottweiler and Weimaraner with a documented crossing with the Greyhound and Manchester Terrier.

Manchester Terriers are considered by many to be the oldest of all identifiable terrier breeds. They are mentioned in books dating back to the early 16th century. They are intelligent, inquisitive and tough, making loyal, eager-to-please companions. The American Temperament Test Society reports a test pass rate of 87.1 per cent for Manchester Terriers; the average pass rate for all breeds is 80.4 per cent.

The Manchester Terrier has its roots in urban industrialisation when sanitation was poor and rats were a health menace. Rat killing was a recognised trade and an enthusiast named John Hulme reportedly crossed a Whippet with a Black and Tan Terrier to produce a dog that would excel at it.