He went on to be a "good" stallion, getting important winners such as Falcon Flight (Prix Hocquart), Persian Heights (St James's Palace Stakes) and Bold Russian (Celebration Mile).
[5] Four weeks later she was moved up to Listed class and won the Silver Flash Stakes at Phoenix Park by a head from the odds-on favourite African Dance.
Shadayid emerged to make a challenge, but Kooyonga ran on strongly to reverse the Newmarket form and win by three quarters of a length.
[10] In September, Kooyonga was prepared for an Autumn campaign with a run in the Matron Stakes, then a Group Three race, which she won by a length from Blue Daisy.
Kooyonga moved into second place behind Shadayid in the straight and ran on strongly to overtake the English filly but was herself passed in the final furlong and beaten one and a half lengths by Selkirk.
Kooyonga was then moved up in distance to ten furlongs and sent to Royal Ascot where she showed much improved form to finish first in the Prince of Wales's Stakes (then a Group Two race).
She had hung to the right in the closing stages however, and was disqualified for causing interference to Young Buster who finished third, with the race being awarded to the Henry Cecil-trained Perpendicular.
Kooyonga quickened into a clear lead a furlong out before being eased down in the closing stages to win "comfortably"[15] by three quarters of a length from Zaahi, with Perpendicular third.
[16] Kooyonga was made favourite for the International Stakes at York but ran very poorly, struggling to go the pace from the start and being "virtually pulled up" by O'Connor in the straight.