A Dandie Dinmont Terrier is a small Scottish dog breed in the terrier family. The breed has a very long body, short legs, and a distinctive topknot of hair on the head. They are friendly but tough, and are suitable for interaction with older children. There are no breed-specific health concerns, but they can be affected by spinal problems due to their elongated body, and the breed is affected by canine cancer at a higher than average rate.