I've been there Howard, course with the mastiff that dog notices everything out of place and I probably would complicate things if I tried to get too specific by controlling what she's naturally inclined to do. Anyway, I think that's a great example where the big picture matters but if you aren't aware of the details that impact achieving success with the big picture, all the attention to detail in the world isn't going to matter.
Different context for me. It happened with my dutch. I exposed her to everything I could think of, every surface, environment, noise, retrieve items (pvc, aluminum, copper, wood, glass, etc.). But when the day came, I missed something very criticial and obvious element and it showed the day I had her tested by the PD for single purpose application.
It wasn't until someone who knew better explained the situation to me that I realized what I had overlooked. The officer suggested I bring the dog back out in a few months. Unfortunately he's gone now - KIA with another officer on the same call. But interestingly, I heard on the radio just yesterday that since now MJ is legal in AK (in a different context than it was previously) the K9 units may have to replace all their drug dogs. It may be worthwhile to have them take a look at her again.