Terriers Loyal Hunting Companions - Edge Books: Hunting Dogs Author:Gail Langer Karwoski What makes a terrier a great hunting dog? Hunting is in a terrier's blood. Terriers were bred to hunt vermin such as rats and badgers. The Terriers book gives tweens and teens a basic introduction to the different terrier breeds and explains specific training techniques readers can use to turn their dog into their best hunting companion.