The More Joyous saga may not be over yet, with Gai Waterhouse to consider appealing a $5500 fine for non-disclosure of the condition and treatment of More Joyous before her failure in last month's All Aged Stakes.

The trainer will also have to answer more questions about the mare after it was revealed at Monday's hearing More Joyous was lame on the Tuesday before the Queen Of The Turf Stakes three weeks earlier.

Racing NSW stewards said it was clear under the Rules of Racing that Waterhouse had an obligation to report More Joyous was suffering from a sore neck in the week before the All Aged Stakes on April 27.

She was fined $5000 for the breach and $500 for not keeping her treatment records up to date.

"There are enough elements to determine this is a serious breach," chief steward Ray Murrihy told Waterhouse.

"We shouldn't have been kept in the dark.

"The public is also entitled to know if there have been problems.

"Racing NSW vets would have scrutinised the horse and the interests of everyone would have been served.

"We will also look at whether treatment given before the Queen Of The Turf ought to have been reported."

A raceday inquiry was sparked after owner John Singleton sacked Waterhouse in a post-race television interview, saying her bookmaker son Tom Waterhouse had passed on information the mare could not win.

Ex-footballer Andrew Johns was among the witnesses called to the inquiry. He denied he had discussed the health of More Joyous with his Network Nine colleague Tom Waterhouse, who was cleared of any wrongdoing.

Waterhouse defended her position, saying as a professional horse person there was no problem in her mind.

"There is no doubt in my mind she was fit to run," she said.

"There was no problem.

"I'm qualified in what I do. I'm a horse person from my top to my toes.

"Someone has to make the final decision and I want all my horses to run well.

"I want them to win."

Waterhouse said she was "agitated" when the raceday inquiry was opened, reacting to the way Singleton had treated her.

"Thanks to Mr Singleton I couldn't think straight," she said.

"I was so agitated. He was crazed. He was a crazy person."

At an earlier hearing, Singleton was fined $15,000 for his conduct and admitted he should have approached stewards rather than make a public display.

Punter Eddie Hayson has yet to provide the final piece of the puzzle, after giving evidence he had a source "connected" to the stable who said the mare had been treated during the week.

Hayson has not yet revealed those names to stewards and could face sanctions.