Teach your dog to carry while she is young. Holding, carrying, and retrieving do not have to be associated entirely with a dog’s adult life, or with Obedience Trials. Even a young puppy can be taught to hold and carry if you place something in her mouth and encourage her with “Take it to so-and-so!” [...]

Before teaching the RETRIEVE OVER HURDLE exercise, train your dog in the jumping part without the dumbbell. Never correct for such things as not jumping, or for poor sits and finishes, while your dog is learning the retrieve part of the exercise.
Take your position in front of a low Solid Hurdle with your dog at [...]