Bocca Baciata is being checked over as connections seek to discover why she ran so poorly in the Prix Jean Romanet at Deauville on Sunday.
The four-year-old filly, trained by Jessica Harrington, was sent off favourite to pick up her first Group One following her victory in the Group Two Kilboy Estate Stakes at the Curragh last month.
However, she ran no race at all and trailed home last of the 10 starters behind James Fanshawe's Speedy Boarding.
"She didn't run to anything like her form. She was just dull in herself and we're just running some tests to see if she is all right," said Alan Cooper, racing manager for owners Flaxman Stables Ireland.
"She had an off-day and we'll get her back."
Bocca Bacciata holds entries in the Moyglare "Jewels" Blandford Stakes at the Curragh on September 11 and the Qipco British Champions Fillies & Mares Stakes at Ascot on October 15.