FORMER top-flight juvenile Go Indy Go has been retired and will be served by super sire Fastnet Rock this season.

Managing owner Harry Perks said the decision to pull the pin on the four-year-old’s racing career had been made following her last-start failure in the Listed Penny Edition Stakes at Morphettville on August 22.

The mare could not recapture the two-year-old form that led Hall of Fame horseman Leon Macdonald to rate her potentially the best horse he had trained.

She was a dominant winner of the Group 1 Champagne Stakes at Randwick in her debut season but went winless as a three-year-old through the Melbourne Spring Carnival, though she was placed twice at Group 2 level — in the Tranquil Star Stakes and Moonee Valley Vase.

She raced twice at Morphettville this season but showed none of the spark that had her rated among the most promising young horses in the country.

She retires with two wins from 11 starts for earnings of $420,450.

“She had a few issues after her two-year-old days,” Perks said.

“She came back and had an ulcer then she had other things go wrong. There were lots of little things that added up to big things.

“We thought we had her right and brought her back … but obviously she’s not and I think she’s lost a bit of interest in racing.

“We’ve decided to put her to stud. Right now is the start of the stud season and we’ve got her into Fastnet Rock.

“We’ll give her the best chance. She deserves it.”

Go Indy Go, a daughter of Bernardini and quality producer Elegant Eagle, has significant value as a broodmare and Perks has not ruled out the possibility of selling her.

“I’ll keep my options open and see what happens,” he said.

“Her mother’s first three foals are either stakes winners or stakes placed. The mare’s done a very good job.

“I’ve normally in the past sold my Group 1-winning mares because there’s a lot of capital tied up in them.

“If you have to pay huge service fees, it makes them a risky business.

“We’ve bred them (Group 1 horses) in the past, with horses like Serious Speed, Southern Speed and Devil Moon. We’ve shown we can do it without having to send Group 1 mares to top stallions.

“The mother is in foal to Bernardini and I’m hoping for a filly. That’s another reason I can keep my options open.”

The service fee for Fasnet Rock, who stands at Coolmore Stud in the Hunter Valley, is listed as “price on application” but is believed to be around $200,000.

He had 47 yearlings sell at the Inglis Easter Sales for $23.175 million, an average of $472,959.