What one dog finds rewarding or pleasurable may be boring, unpleasant or even punishing to another dog. For example, some dogs absolutely adore car rides while others get car sick.
Canine Communication
How to Motivate Your Dog
Do you really know what motivates your dog? When your dog is motivated he learns much faster. Many owners have never really thought about what motivates their dog. They assume because he's a dog that he will enjoy ‘Dog' things i.e. things most dogs find rewarding. Applying this to your dog is akin to saying that ALL humans enjoy playing sport (I know I certainly don't!).