She was moved up in class and distance for the Group Three Prix d'Aumale over 1600 metres at Chantilly Racecourse in September and won again, beating Minstrel Girl by one and a half lengths with Cheerfully in third place.
The filly was stepped up again in class for the Critérium des Pouliches at Longchamp Racecourse and started 2/1 second favourite behind the Prix Robert Papin winner Pitasia.
[2] Dunette began her second season in the Prix Vanteaux over 1900 metres at Longchamp on 16 April in which she was matched for the first time against the Alec Head trained Three Troikas.
Her next appearance was the Prix Saint-Alary over 2000 metres at the same course on 20 May when she started 11/1 fourth choice in the betting behind Three Troikas who had won the Poule d'Essai des Pouliches in the interim.
She set off at an exceptional pace, proving too fast for the Head stable's pacemaker Sealy, but was exhausted by the final turn and faded to finish fifth behind Three Troikas, Pitasia, Salpinx and Karinetta.
Three Troikas, coupled in the betting with her pacemaker Sealy, started at odds of 1/10 ahead of Producer (winner of the Prix de Royaumont), Nonoalca (runner-up in the Poule d'Essai des Pouliches), Cheerfully, Pitasia and Salpinx.
In the closing stages he faced a strong challenge from Shakapour and the two horses crossed the line together with the racecourse judges declaring a dead heat.
Doleuze was criticised for raising his arm to celebrate victory at the finish, although Shakapour's jockey Yves Saint-Martin was also at fault, having dropped his whip in the closing stages.
Later in July, she was sent overseas for the first time to contest Britain's most prestigious weight-for-age race, the King George VI and Queen Elizabeth Stakes over one and a half miles at Ascot Racecourse.
Despite conceding two pounds to her old rival, Dunette won comfortably by half a length from Three Troikas with Doloeuze patting her on the head as she crossed the line.
She was prominent from the start and looked to have a good chance in the straight but was unable to quicken in the closing stages and finished seventh behind Detroit, Argument, Ela-Mana-Mou, Three Troikas, Nebos and Nicholas Bill.