Dexter was a terror with the nipping but he has grown out of it now. You have to be very consistent with the NO BITE and then give her some she should chew on instead. It takes awhile and I know it can drive you nuts. I was beginning to think maybe he was just going to bite people forever but it is a puppy thing. He even did it after his baby teeth fell out but much less often. Now if he nips by accident I help and he looks sad and licks me or sniffs where he bite. He then runs and gets his toy like, "Oh I forgot, sorry". She'll get better, I promise.