Week 11. Mouthing is normal. Teaching a soft mouth is the job.
Why puppies bite
Teeth are how they explore and play. Pain tolerance in littermates taught them to be gentle. Now you are the littermate.
Ending the game
Teeth on skin, the game stops. Stand up, turn away, count to five. Come back and offer a toy.
Chews
A frozen stuffed toy in the evening when the biting peaks.