Use meal times to teach your puppy to have a soft mouth. Easy and fun!
This video explains easy exercises that you can do with your puppy to teach him to have a soft, gentle mouth.
If you consistently use one meal per day to teach your puppy to have a soft mouth, you will make a lot of progress.
You can do this with any puppy, even a puppy with a rough mouth.
As your puppy gets more practice, try this exercise.
Some puppies have REALLY rough mouths (I have the scars on my hands to prove it). If this is the case with your puppy, do the Easy Exercise more frequently until your puppy starts to understand. As you feel more brave and do the More Difficult Exercise, give him the piece of food even if he is a LITTLE more gentle. You can't expect perfection right away.
Try and get a little more progress each time.