Genevieve

Devo, I would soldier on with ignoring your puppy completely for doing the wrong thing. If you wish to say something try "oops" and then reward immediately the calm behaviour that you want. It is hard to scream "oops" at your puppy, but if you would like to give him some feedback that he has not suceeded in gaining a reward from you, this could be a word you use. You don't want to be punishing a new puppy by screaming at it. and as you said, he just keeps on going with his biting. No punishment working there or the behaviour would have stopped. Pups mouth really badly around 12-14 weeks old, owners must do their upmost to ignore, if it means removing the puppy from you if the puppy is really excited, than do so. Not as a punishment or a sinbin, but as time away from you where the puppy is not practising the behaviour. Yelling or saying no to a dog does nothing at all. Good Luck

No - definitely Ignore your puppy when doing something you do not want. Behaviours that are rewarded will continue and behaviours that are not will go away. Saying No to a puppy maybe a reward to that dog, and the behaviour will continue. Some puppies whom maybe sweet and shy in nature will cringe and they may not bite again, but at what cost to your relationship with your new friend. Sounds like your puppy class is up to date and teaching you the correct method on how to raise a puppy. Puppy classes that recommend growling like a dog and free for all play sessions are now a thing of the past. Thank Goodness I bet if you check the qualifiacations of your instructor they are very up to date.