One Cool Cat, who flopped when favourite for the UltimateBet.com 2000 Guineas at Newmarket earlier this month, has not been declared for the Irish equivalent at the Curragh on Saturday.
Aidan O'Brien's charge finished 13th of 14 on the Rowley Mile and was later found to be suffering from an irregular heartbeat.
One Cool Cat had been 9-4 second favourite with totesport for the Curragh Classic.
O'Brien will now rely on Grand Reward, the mount of Jamie Spencer and Newton in the eight-runner field.