Eeek.. Hmm.. are you planning on taking her to Puppy Classes? None of my 4 dogs have been to obedience school, but none of them have ever had aggression problems like that.. Maybe Puppy Obedience would help her? Not sure how old the pup has to be to enter classes though..

I've noticed that Labs seem to be getting more aggressive. There was a 5 month old Lab puppy at our dog park once, and she was attacking the other dogs at the park pretty aggressively. Even I had to pull her off this other pup once because the owner was too far away from her to grab her. It may be over-breeding that's causing the problem though. Makes me sad..