Harbinger has undergone surgery on a fractured cannon bone but his racing future remains in doubt.Officially rated the world's best following his brilliant win in the King George VI And Queen Elizabeth Stakes, Harbinger suffered the injury during a routine workout at Newmarket on Saturday.John Warren, director of Harbinger's owners, Highclere Thoroughbred Racing, said the horse was making a good recovery."The horse is very comfortable and the cast that was put on his leg to help him get up after

Harbinger has undergone surgery on a fractured cannon bone but his racing future remains in doubt.

Officially rated the world's best following his brilliant win in the King George VI And Queen Elizabeth Stakes, Harbinger suffered the injury during a routine workout at Newmarket on Saturday.

John Warren, director of Harbinger's owners, Highclere Thoroughbred Racing, said the horse was making a good recovery.

"The horse is very comfortable and the cast that was put on his leg to help him get up after surgery has been taken off," Warren said.

"He's eating up well and has a very good demeanour about him, so it is a very good report about his well-being, which is a great relief.

"We plan to have a discussion with all the shareholders ... and after consultation with all concerned, we will make a statement."

Trained by Sir Michael Stoute, Harbinger's finest hour came when he won last month's King George by 11 lengths in record time.

He was next scheduled to run in the Juddmonte International at York later this month, after which the Prix de l'Arc de Triomphe was on the agenda.

The son of Dansili was clear favourite for both races.