I've been trying to train my dog to retrieve a dumbbell. I taught him to hold it, no problem. He will take it out of my hands properly and heel by my side around the house with it. I am trying to teach him to retrieve it. After I toss it, I can't get him to pick it up by the bar. He always picks it up by one of the ends. Any ideas on how to get him to pick it up properly? I know this is probably a stupid question, but there ya go......I'm the dumbbell!