Two feature races from the Hawkesbury meeting will be run at Rosehill with the NSW provincial club forced to call off its premier raceday because of safety concerns.

Jockeys declared the heavy track unsafe after a horse broke down in the first and only race run on Saturday.

A delegation of riders including senior jockeys Jimmy Cassidy and Christian Reith met with stewards after the first race ended in tragic circumstances for trainer Joe Pride when Proper Madam broke her off-fore leg after stumbling at the 400m.

"She was blundering the whole way. It was the track for sure," Proper Madam's rider Reith said before going behind closed doors to speak to acting chief steward Marc Van Gestel.

Van Gestel and his panel met with the 11 jockeys who rode in the race before ordering a track inspection which centred on a section of the track from the 900m to the home turn.

The inspection lasted 25 minutes before jockeys voted unanimously not to continue riding.

"There are a number of holes in the track from when they raced at the last meeting and they are at vital stages of the race when you are turning," Cassidy said.

"This is one of our great meetings and it's just unfortunate but obviously safety has got to come first."

Van Gestel said 11mm of rain which fell in the hour before the first race had sealed the fate of the meeting being run on anything but a heavy surface.

"Having a look at the track it is clear there are a number of areas there that had broken up during the first race," he said.

"With additional racing we weren't confident horses were going to get adequate footing and riders were of the same view.

"The other issue was the visibility because there was a lot of debris coming back at the riders at the tail of the field and horses were blundering as a result of that as well."

Racing officials moved quickly to save two feature races from the meeting.

The Darley Crown and the Hawkesbury Guineas will be added to next Saturday's Rosehill card while an extra race has been programmed for Warwick Farm on Wednesday to cater for horses which missed out on running in the Hawkesbury Gold Cup.

Hawkesbury chief executive Brian Fletcher said it would be next to impossible to postpone the meeting which offers $1 million in stakes.

"You wouldn't even think of taking the risk of racing on Monday. It's just not feasible," he said.

"Even by Wednesday you will still have a very heavy track."

The Kim Waugh-trained Oxford Poet won the PFD Food Services Handicap, landing a $5 to $3.80 betting move in an all-the-way victory.