Mikel Delzangles is mulling a crack at the Caulfield Cup for Dunaden before a possible defence of his Melbourne Cup title.

The six-year-old took the two-mile Group One contest last November but has since developed into a smart middle-distance performer, winning the Hong Kong Vase, finishing second in the Hardwicke Stakes and a close-up sixth in the King George.

Delzangles has been aiming towards the Prix de l'Arc de Triomphe with Dunaden this term, but could now reroute to the Caulfield Cup on 20 October before heading to Flemington on 6 November.

"We're leaning that way now," Delzangles told racingvictoria.net.au.

"Obviously we were looking at the Arc but if he could win the Arc with 59 (kg) then he could perhaps win the Caulfield Cup with 57 or 58 (kg) and he's proven in Melbourne.

"I think maybe we will back and if we come, I think we would run in the Caulfield Cup."

Delzangles appeared to have another string to his bow in Vadamar but that horse now seems unlikely to make the trip after finishing fourth in the Prix Kergorlay at Deauville on Sunday.

"He will come on from this run but he's only a four-year-old and I'm not sure he's quite ready for the Melbourne Cup. Maybe next year," the trainer said.