Eoin Griffin is "hopeful rather than confident" that Kazal will make it back on to a racetrack after his latest breathing operation.
The nine-year-old was third behind Inglis Drever and Kasbah Bliss in the 2008 World Hurdle but has failed to reach those heights in four subsequent runs.
If he does manage to get back on the track, a novice chase campaign is in the offing after he failed to win his only two previous runs over the bigger obstacles in 2007.
"Complications set in (after a wind operation after the Galmoy Hurdle last year) and they had to go back in and undo what they did -- it was actually touch and go with him for a while," said Griffin.
"He recovered from that but after the series of procedures, even though he is back in training now, we're more hopeful than confident that he'll make it back to the racetrack at some stage."
Last poised for Irish National
United House Gold Cup winner The Last Derby will be aimed at the Powers Whiskey Irish Grand National.
Eoin Griffin's six-year-old sprang a 33/1 shock back in October but disappointed on his next start in the Rehearsal Chase at Newcastle.
However, Griffin believes he is much better going right-handed and will keep him going in that direction for the foreseeable future.
"He is a completely different horse going right-handed.
"We'll keep him going that way for the time being.
"He is on a bit of break at the moment and we'll probably be getting him ready for the Irish National and hope for a bit of nice ground around Easter. On his day he is a very nice horse."
Lady lined up for Guineas
Stan Moore may be forced to send Lady Darshaan straight to the 1,000 Guineas at Newmarket on May 2 due to the current cold snap.
Although Moore believes the Arctic blast could have held up fillies in their work, he is more than happy with the condition of the daughter of High Chaparral, who was last seen finishing second in the Group One Fillies' Mile.
"She is doing super and, depending on how she comes to herself, she may go straight to the Guineas as fillies are going to take time to come to themselves in this weather," said Moore.