My view:
R1 at SA today, the #1 horse stays straight as a string through the stretch, and gets bumped repeatedly by the favorite #3. The #2 caused a lot of the bumping - but she finished 3rd.
Now, was the 3 horse the best in that race? probably, but what exactly did the 1 do the warrant a DQ? The #1 horse seems to have stayed in his same path around the turn and into the stretch. Seemed like good race riding to me.
They DQ the #1 to second.
replay here:
http://www.calracing.com/live-video/replays/