I've done a bit of training with one of the top AKC trainers in Ga (who also trains the conyers K-9's) If its a lab.. they LOVE bitter apple.. and its only good for toys and that sort of thing. If you are trying to keep puppy from biting you the best thing to do is whine/cry when the puppy bites you then step away. The point of this is making it seem like the puppy hurt you. You can also gently pop is on the nose and say "no bite" then give it a toy which you will allow it to play/bite on. The main thing is no to intimidate the puppy but to teach it what you want. Remember the next 4-5 months will determine what kind of dog you will have for the next 11-15 years. Play with the paws.. if he tries to bite you continue to play with them. Make sure you can stick your fingers in the puppys mouth (this will come in handy for brushing teeth and removing sticks or other objects). Whatever you want puppy to do when its grown.. do now.. if you want it on the couch when he/shje is big.. let them now.. if not.. do not let them now.. puppy wont realize when he is full grown why he cant get on the couch anymore. Same with leash walking and biting. ( Can u tell I give this speech alot??? LOL ).. Feel free to PM me for anymore questions...

-Ren