I usually don't ask for much behavioral help, but I've always struggled with getting a dog's undivided attention. While at an orientation/behavioral examination today, Giselle behaved so poorly it was almost embarassing

We were supposed to do a "serpentine", or maneuver around a couble obstacles. I thought this would be easy enough, but as soon as we got up to do the obstacle, she strained at the leash and would not look at me. Naturally, I got very frustrated and tense and she must have sensed it because she completely shut down. It was basically me dragging her through the course.

My question now is how to get her to focus? She has a mediocre "Watch Me" and her heel is fabulous out on the streets. But once the pressure starts sinking in, I get tense and she doesn't perform. Does anybody have any suggestions both for myself and Giselle? We really need to work on this before our next evaluation =/