snapping lab

Question
I am at my wits ends with a 9 week old female yellow lab we acquired from a breeder.  I have been very consistent with attempting to say no to her when she is doing something wroing, like chewing on wood, rugs, ankles, etc.  I do not let her continue chewing, I say a loud NO in a firm voice, but she is snarling and showing teeth at me when I correct her.  She stops what shes doing wrong and literally attempts to "attack" me and to tell you the truth, and I am not new to dogs, the noises she makes are frightening.  What is your opinion?  She was gotten at 7 weeks and was extremely docile and quiet for a week, then last week all heck started breaking loose. She is being taken outside at least 20 times a day.  She is also being crated, but not for more than two hours at a time. She goes down at 10, wakes around 5.  Please help; I am ready to return her.

Answer
Some puppies can be difficult and combative.  Lower your voice.  Perhaps an ''Ut, ut, ut!'' will be better than the ''No''.  Continue your consistant corrections.  Give her one of her own toys in place of the forbiden.  We have found suspending small puppies quickly teaches them who is top dog.  When she snaps or growls, you can pick her up with your hands behind her front shoulders and hold her up with her back to you.  Keeping her far enough away to keep her head from smashing into your face, hold her until she stops struggling and relaxes.

Having a good pack structure reduces such problems.  The dogs see all the
people and dogs in the household as a pack with each having their own rank in
the pack and a top dog.  Life is much easier if the 2 legged pack members
outrank the 4 legged ones.  You can learn to play the role of top dog by
reading some books or going to a good obedience class. A good obedience class
or book is about you being top dog, not about rewarding standard commands with
a treat. Start at http://www.dogsbestfriend.com/