How rare is a Dandie Dinmont Terrier?

The Dandie Dinmont is listed as one of the rarest dog breeds, with only a few hundred puppies registered each year in the United Kingdom and the United States. There are relatively few breeders specializing in Dandie Dinmont Terriers, as the breed has never gained widespread popularity outside its native region. Additionally, Dandie Dinmont Terriers typically have small litter sizes, often only producing a few puppies per breeding.