We had a similar problem with one of our Dobermans. We had "trained" her to demand her breakfast as soon as we woke up. The pattern had been to feed the dogs, then get in the shower, etc. She soon figured out that if she made a racket and woke us up early, she would get her breakfast early. We "de-trained" her by gradually lengthening the time between getting out of bed and feeding her.
I would highly recommend that you read "Don't Shoot the Dog". It explains all the things that we do, even when we don't realize it, that trains the people and animals around us to do certain behaviors. I read it when I was training and showing dogs competitively (in obedience). While the book helped my showing, it REALLY helped my marriage.