David Casey rides at Ayr
(Healy Racing Photos)
Clerk of the course Emma Marley took an initial look on Wednesday, and called a further 8am inspection this morning due to frost.
That check proved inconclusive, as did a further inspection at 11.30am, but the meeting was finally given the go-ahead after a 1pm look.
Marley said: "Racing goes ahead. We are up to 5C now and the whole track is completely raceable. The going is soft."
Don Cossack will try and get back to winning ways at Naas on Sunday, when he lines up in the Grade 2 padypower.com Novice Hurdle where Brian Hamilton's Moscow Mannon will be a rival. Don Cossack ran a fine race behind the Cheltenham bound Mozoltov in a Grade 2 the last day at Punchestown.