Jockeys Ben Looker, Josh Adams and Jake Hull have been taken to hospital after a three-horse fall at Grafton.
Looker was concussed and complaining of a sore right thigh while Adams was treated for a cut on his chin and a slight concussion.
Chief steward Mark Holloway said Hull, who appeared to escape unscathed, would also be assessed for concussion.
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Sky Racing presenter Priscilla Schmidt, who is engaged to Looker, said he was moving all his limbs.
“He was in and out of consciousness and a little bit groggy,” she said.
“He has a bit of pain in his leg but is moving all his limbs.”
The fall happened on the first day of the annual Grafton carnival featuring the Listed Ramornie Handicap.