One of last year's spring stars Rich Enuff is out of the autumn with a tendon injury to his offside hind leg.

Trainer Ken Keys said he has had the injury scanned and while it is a minor it has ruled him out of the autumn.

Keys described the injury as "strange" with veterinary surgeons at the Werribee equine hospital saying they had not seen too many similar cases.

"He's not chronically lame," Keys said.

"It is more of a resting lameness with him toe-pointing on his back leg.

"We initially thought it was an infection around the hock area but that proved not to be the case and this is what the vets came up with.

"The Werribee people haven't seen too many cases like it and I certainly haven't.

"It's even hard to find any literature on it."

Keys said Rich Enuff would be stabled and yarded for a month before the hock area is re-scanned to see how the tendon is healing.

He said the prognosis from vets was quite promising and it was a simple decision to turn him out.

Keys also said luckily he had not increased the colt's work after Rich Enuff had only recently overcome a setback due to an elevated white cell count.

Rich Enuff was being prepared for an autumn assault on the Newmarket Handicap (1200m) at Flemington in March before heading to Sydney.

The son of Written Tycoon hasn't been seen since running seventh in the Group One Coolmore Stakes at Flemington last November which followed wins in the Mitchell Stakes at Moonee Valley, the Danehill Stakes at Flemington and the Caulfield Guineas Prelude before running a brave second to Shooting To Win in the Caulfield Guineas in October.

"You have to enjoy the good times because they don't last long," a philosophical Keys said.