My puppy "Calvin" is 10 weeks old and he is biting a lot! He has been doing this since we got him at 8 weeks. He gets in these wild moods and bites all of us. He just bit me so hard it broke the skin on my finger. I have talked with my vet about this at his last check-up and he said I should hold his mouth closed and in a mean voice say "No Bite" well I do that and pretty much as soon as I release him he is still nipping. Sometimes this will correct it. My other Cavalier did not do this. I would love any suggestions you all may have. I have read in a puppy book that if you don't stop this he may keep doing this into adulthood.