A sheepdog trained to run over the backs of sheep while driving them in confined spaces.
 a backing dog is worth a lot to the station which owns him
 Example sentencesExamples
-  A backing dog needs special training and is much in demand.
 -  A dog trained to do this is called a backing dog, and he's worth a lot to the station which owns him.
 -  This agility came from his mother who was trained as a backing dog.
 -  Experienced field trial dogs will frequently see this scenario and move toward the action in hopes of getting involved, usually as a backing dog.
 -  As a backing dog you'd have thought he had wings.