Yup. Great advice posted above. Maybe get a behaviorist in and get some advice from them. But Obedience is a great idea. Biting people is a BIG no no!
Please please please give Maggie the steak! Its not too big for her little mouth!
Their impression of power is remarkable. They give one the feeling of immense reserves of energy, of great reservoirs of knowledge, of tolerance of disposition, obstinacy of purpose, and tenacity of principle. They are responsive, and they have a lot of quiet, good sense.
-J. Wentworth Day, from The Dog in Sport, 1938