Molly sounds pretty normal to me too! I hear you on the mouthiness as being annoying since Javelin still can be pretty teeth on (vs. hands on) sometimes, but never with malicious intent. I agree with fjm about upping her exercise, but urge you to make as much of it mental exercise as possible. The working brain is a huge consumer of energy, so working her brain will make her more tired than just running around. The other spectacular outcome of brain work is that nearly all of of does really tremendous relationship building which leads to better attention to you which helps the dog develop impulse control which leads to telling dog to stop using teeth actually working.