Trifolium has second breathing op
(Healy Racing Photos)
The six-year-old was well beaten on his comeback run at Punchestown in October, after which he underwent surgery to correct a breathing issue.
However, it was clear the problem had not been fully rectified when he finished last of four in the Fighting Fifth at Newcastle in December.
Byrnes said: "He's had another breathing operation since his last run. Maybe the Red Mills Hurdle in Gowran might be an option for him.
"I'd like to step down in grade with him. I think a Grade Two would be hot enough for him at this stage."
Hurricane Fly heads six possibles for the BHP Irish Champion Hurdle at Leopardstown this Sunday January 27th.