Cooldine looks set to miss the rest of the season after suffering a wind problem that ruled him out of the Hennessy Gold Cup at Leopardstown.
The nine-year-old filled the runner-up spot in the prestigious Grade One contest 12 months ago and had been as short as 7-2 to go one better.
"An extraordinary thing has happened to Cooldine as his wind has broken, which is quite rare in horses as old as him," said trainer Willie Mullins, who won the Hennessy anyway with Kempes.
"He worked fine on Wednesday morning and then on Thursday the wind problem was apparent.
"He's going to have to have a wind operation and, unfortunately, it looks like he's going to miss the rest of the season. It's very disappointing, but these things happen."