This application is most often used to build longevity into stationary behaviors. It is more common in domestic animal training than some other areas. In more advanced applications, many trainers will prefer to only give primary reinforcement when the animal has completed the tasks at hand at the desired level. Care must be taken that excessive use of this does not happen since it could diminish the association between the secondary and primary reinforcer. Animals will often perform better and learn faster if they have that and consistent feedback.
Feedback can be either verbiage from the trainer or through bridging itself.
In these cases I bridge more and sometimes will go back to basics. Another critical influence to seeing you successful in these situations where you could lose control is the trust factor, or bond, that the animal has with the trainer. Many times when an animal is under stress they will not respond to food rewards or traditional approaches that work well otherwise. This difference is the rapport and trust that takes time to establish with an animal.