bentley used to be a bit of a nipper (not in a teeth baring way or anything - he just liked to nibble lol) ... i would look him in the eyes, say "NO" and gently close his mouth with my hand (the way i think their mommy would do) and hold it for a couple of seconds ... never squeeze or hold down hard in case their tongue is between their little teeth ... he no longer nips but it took a few weeks
