Everything you are saying your puppy does, mine does the EXACT thing... she will be 4 months next weekend, and sometimes she's just such a good girl but then she has her days were i've nicknamed her Crocadile Rylie, she LOVES to bite specially fingers... after reading posts from here i went out and bought the Bitter Apple i must tell you that for my puppy it did not work... she would lick my fingers and keep chewing on everything i sprayed it on. What i have found works and distracts her for a while are Digestable/edigble Nylabone... but because she is such a chewer the pet store people told me to go for "wolf" size rather then the little petite ones.. (they last a lot longer also) Another thing that distracts her from biting and getting into trouble is i give like piece of carrot..(baby carrot size) she loves it and plays by herself with it before she sits down to eat it...
Good luck with the puppy training.. Rylie starts her puppy classes tomorrow so hopefully that will help me and her with the training.
