History of the Bedlington Terrier . A one-of-a-kind, lamb-like breed, the Bedlington Terrier is said to have been bred from sighthounds like the Whippet due to its arched back (not to mention its speed and agility), but it is also believed to share common ancestry with breeds such as the Dandie Dinmont, Kerry Blue, and Soft-Coated Wheaten Terriers.