Speedy i would advice the lady to speak to her vet and get expert advice..I would also look into using a DAP(The Dog Appeasing Pheromone) calms stressed and anxious dogs and honestly they do work as ive used them on one of mine.Although he wasnt nervous or fearful..i do believe with the right advice this lady can turn the dog around it wont happen overnight she will have to put in lots of hard work and repertition but well worth it..good luck