Our 6 month old female GSD is still biting us all the time! I'm worried that this behavior will be harder to break the older she gets. We ALWAYS redirect to a toy but she still feels compelled to bite us when she's excited, hungry, has to go out, or wants to play, or for no reason I can tell. Yelling NO! does not help. She barks back and gets excited which leads to more biting. She likes bitter apple taste, so that was useless. Other than that she's doing great with training. Seldom accidents, loose on leash walking, knows basic commands and some tricks, obeys her limits in the house (no couches, etc..). She gets lots of attention and plenty of exercise every day. Any further advice before we break down and get the shock collar? Should I even expect biting to stop at 6 months? Thanks for any advice.