Here is a little hint. Most trainers recommend force fetching once the pup has its adult teeth> I have had awesome success with "force breaking" them as soon as they come home. Use their instinct to chew. Put on a clean leather glove, give them your first 2 fingers, they will immediately take them in their mouth and want to chew. when they do, give the FETCH command. Then put your thumb under their jaw, apply enough pressure to stop the chewing and give the HOLD command. as soon as they quit chewing give the hold command again. then take your fingers from their mouth and give the GIVE command. I do this a couple of times a day transitioning up to a soft small bumper when the pup is big enough to take it in it's mouth. Do this and your pup will be almost completely "Force Broke" by the time serious training starts.