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.