I too had a hard time when Otis was younger, I thought I'd never get through it and that I had a "devil" on my hands - hang tough, it does get better as they get older. If I can suggest a couple of things - a water bottle to spray at her when she bites (Otis hated it) or when she starts biting put her on her lease and put the lease on a door knob in your house and calmly tell her NO, once she calms down, take her off and try again, if no better back to the leash/door knob. GOOD LUCK! It's so hard.