Trainer Stephen McKee thought something had gone wrong when O'Marilyn struggled to get to the leaders on the home bend and started to paddle at the 375m. O'Marilyn finished seventh, 6.3 lengths behind winner Platinum Witness.
"Sam Spratt came back and said the filly had proved hopeless in the footing," said McKee.
"I said, 'It's not that bad is it?' and she said O'Marilyn couldn't hit out at all like she has in her previous races."
Co-trainer Andrew Forsman said Bonniegirl was very sore in her hindquarters after the race: "Mark was following O'Marilyn and saw her go through a rough patch on the home bend, which he thought he'd missed and he said O'Marilyn looked unbalanced.
"Mark thought Bonniegirl had broken down so he eased her up." O'Marilyn has come through in good shape, the pain in her case being in the wallets of the thousands who backed the classy filly. The disappointment for the connections of the fillies affected on Saturday is that a win could increase the horse's residual value by $200,000 to $600,000.
McKee said another problem is not knowing whether O'Marilyn can negotiate Saturday's 1600m. "I don't want to be critical of the club because they try their best, but Saturday was a bit disappointing for a group one day ... The upside is that we still have a filly."