registration certificate: The paper certifying a dog’s registration with an accredited organization.

registration slip : An application to register a purebred puppy.

release word : A word that lets a dog know that she is free to move.

rescue group : A network of animal lovers who rescue and find new homes for their favorite breeds or animals.

reward: To give a dog a treat for a correct response while he’s still in the desired position.

ruff : The long, thick fur around a dog’s chest, shoulders, and neck.