Injured Group One winner Gingernuts has had a setback and has been returned to the Werribee University Clinic where he is being monitored for infection.

The New Zealand-owned gelding suffered a pastern injury on the way to the barriers for the Emirates Stakes at Flemington on November 11 for which he was the pre-post favourite.

After surgery at the Werribee hospital, Gingernuts was discharged last week to a nearby rehabilitation facility.

But he developed complications over the weekend and was taken back to the clinic on Monday.

"He had a number of perfusions over the weekend however the specialists were still concerned and yesterday they sent him back to the University Clinic (Hospital) at Werribee," Te Akau Racing said on its website.

"Despite looking well and outwardly appearing in great shape, the veterinary team overseeing his recovery have become concerned over a possible infection developing as a result of the surgery.

"There is a genuine hope that he's responding well to the latest round of treatment.

"Everyone in Australia raves about him - they just love him, he is such a wonderful patient that they can do anything with and for. He has a massive fan club and he deserves that, he is a true gentleman and such a kind horse in every way.

"He will remain at the University Clinic until at least the end of the week."

The winner of the New Zealand Derby in March, Gingernuts also won the Rosehill Guineas in Sydney in the autumn and added the Windsor Park Plate to his Group One record in September.