Charlie Hills believes the next couple of days are crucial if Kiyoshi has any chance of making the Irish 1,000 Guineas.
The filly will continue to be monitored closely, although Hills reports her to have improved on Monday after she was found to be lame after a routine exercise on Saturday.
Kiyoshi scanned fine after X-rays, but the next 48 hours are likely to tell Hills if he can prepare her for the Curragh on May 25.
"She's certainly better today that what she was yesterday. We're just going to start a little exercise," said the Lambourn trainer.
"All being well the next couple of days will tell us and if all does go well we'll go to the Irish Guineas.
"The next couple of days are crucial."
