Pracey-Holmes was riding Jondarborg for Dubbo trainer Michael Mulholland in the Robert Handsaker Ford Benchmark 60 Handicap (800m) when the horse dropped out noticeably in the home straight.

It then proceeded to drift out sharply before wandering back towards the inside rail and eventually crashed through it after crossing the finish line.

A post-race examination revealed the Thorn Park x Message To My Girl gelding had sustained a bleeding attack, collapsed and died.

Pracey-Holmes was unconscious for a short period before ambulance officers arrived and transported him to Narromine Hospital for observations.

He was released on Monday evening.

The rider's boss, Dubbo trainer Peter Nestor, said he will be keeping a close eye on his stable apprentice, who in recent weeks has started to hit his stride after returning from a fall at Scone where he broke his wrist and missed five months.

"Jake's had a bit of bad luck but the good news from this fall is it could have been a lot worse," Nestor said.

"We'll keep an eye on him and see how he recovers. He's a bit sore but should be OK.

"He was a bit sore in the shoulder area so if that hangs around he'll go for an X-ray but hopefully he should be OK."

Central west chief steward Todd Smith said an inquiry will be held into the fall, including an examination of Jondarborg's veterinary records. Mulholland had only been training the gelding for a short period of time after purchasing him for $1800 at a tried horse sale in late September.