My 22 month old gal is dropping the dumbbell about 3 to 5 feet away from me when we practice the retrieve. She's a low drive dog but enjoys working obedience and retrieving the dumbbell. Just getting her to pick it up and return to me with it was a challenge for awhile, but she finally caught on to that after some friendly competition for it with my other dogs. I praise immediately when she picks the dumbbell up and now I wonder if started praising at the wrong point . . .too soon. Also does a 'take' and 'hold' command separately while she's sitting in front of me. . "take" is fine but she doesn't want to "hold" at all .. . All my other shepherds over the years have loved to retrieve and if anything, refused to let go of the dumbbell on returning to me with with it. I don't want to do anything to undo her desire to run and pick it up, but I don't know what to do to encourage her to keep it in her mouth at least to the point she returns withing touching distance of me. . .any suggestions or recommendations of reading material on the retrieve??