Chris,
I started a detailed reply to you and then thought maybe I would go back and re-read Shaldrake's paper. This reminded me of the fact that he is a trained scientist, and the care and caution with which he explored this phenomenon shines out all through the paper. I would ask anyone who has been following this discussion to read the actual paper:
Articles and Papers - Scientific Papers - Unexplained Powers of Animals - A Dog That Seems To Know When His Owner is Coming Home: Videotaped Experiments and Observations - Abstracts
(click on the icon at the end of the abstract to get the full paper in PDF)
Then ask yourself if Chris' use of words like 'shoddy' or 'amateur' are even remotely justified. Just read the paper and compare it with the stuff that Chris has written about it!
David