Group 1 winner Epaulette is a little behind schedule in his autumn carnival preparations, but stablemate Albrecht is on track for a three-start Melbourne campaign.
Trainer Peter Snowden said Epaulette had suffered a setback and would not be back to represent Darley in the early autumn races.
"He's back a bit. He's had a little bit of a setback," Snowden said.
"I'm just not sure where he starts now. It won't be early.
"He's probably a month behind, but I'm not sure."
Epaulette, a three-quarter brother to Helmet, showed his class during last year's spring carnival with a victory over Albrecht in the Group 1 Golden Rose (1400m) at Rosehill.
He then won the Caulfield Guineas Prelude, before finishing third to All Too Hard and Pierro in the Caulfield Guineas.
Albrecht, who has remained in Sydney, was turned out after finishing second in the Group 2 Stan Fox Stakes.
Snowden said the colt, by Redoute's Choice out of a sister to Lonhro, would likely head to Melbourne this week.
"He'll trial in Melbourne on the 25th of January and he runs on the 2nd of February," Snowden said.
Albrecht's return will be in the Listed Manfred Stakes (1200m) at Caulfield.
"He then goes to the CS Hayes two weeks later, and two weeks after that is the Australian Guineas," Snowden said.
The Group 3 CS Hayes Stakes (1400m) and the Group 1 Australian Guineas (1600m), also the target of All Too Hard, are at Flemington.
Two-year-old Guelph is also in line for a trip to Melbourne and will trial at Hawkesbury today or Warwick Farm tomorrow.
Guelph is a daughter of Exceed And Excel out of Group 1 winner Camarilla.
Camarilla won a Blue Diamond Prelude as a two-year-old and was fourth in the Blue Diamond before winning the Group 1 Sires' Produce Stakes in Sydney.
Guelph was second to the Peter Moody-trained Brilliant Bisc in the Gimcrack Stakes on debut in October.
"She'll run on Australia Day at Randwick and then maybe go to Melbourne," Snowden said.
The filly's Melbourne debut would be in the Blue Diamond Prelude.
Australian Associated Press