The Dandie Dinmont is calm and dignified at home but bold and determined when roused, with a deep bark. It is affectionate with its own family, often reserved with strangers, and independent enough to follow its own judgement.
Built for work underground, it is long and low, with short, strong legs, the forelegs slightly shorter than the hind. The back dips behind the shoulders and then arches over the loin. The large, rounded head carries a silky topknot of pale hair, the ears hang close to the cheeks, and the tail curves like a scimitar. The coat mixes harder and softer hair to give a crisp texture. Pepper runs from dark bluish black to pale silvery grey, and Mustard from reddish brown to pale fawn.
The Dandie Dinmont Terrier became widely known after Scott's novel Guy Mannering appeared, and during the nineteenth century it moved from the farm and the hunt towards the show ring. Its admirers founded a breed club in the eighteen-seventies, among the earliest for any breed, and the standard they drew up has changed relatively little since. Despite this long history the breed has remained uncommon, and the Kennel Club lists it as one of its vulnerable native breeds.