So the working dog sees the mark twice. Does this help or hinder most dogs on getting the mark? Seems like it would almost make the mark too easy. When I worked on this, it seemed very easy because my dog was not as ooc before running. He sat quietly and watched the mark. Walking back to the holding blind and coming out to run a blind kept him much saner. So yes, I liked it as a training exercise, but still a little unsure how it plays out in an actual trial.