It is very important when rewarding or motivating a dog to understand what is a high value reward for each particular dog, and what it considers a low value reward.

No two dogs are the same - some dogs will do anything in order to chase a moving toy (or animal!) and would see being allowed access to them as high value rewards for doing something correctly. Meanwhile, other dogs would look at the passing toy or furry creature either with indifference (as they have no instinctive desire to chase a moving object eg Setters) or have built up bad associations with those moving objects (eg another dog in its household guards toys, so this dog has learnt to stay well away from such objects).