Anthony Cummings will have to rely on Calamba to snare a feature race win at Warwick Farm on Saturday after a campaign-ending injury to She's A Fox.
The exciting filly, who was to have contested Saturday's Silver Shadow Stakes, pulled up short in her action after a gallop on Tuesday.
Further investigations revealed She's A Fox had injured a ligament at the back of a knee and the decision was made to terminate her spring campaign.
"We could have pushed on and treated it but she's too good a filly to risk," Cummings said.
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"We took the conservative view in dealing with it. She will have some treatment and she'll be out for three months and come back in the autumn."
She's A Fox was considered one of the leading chances for next month's A$1 million Golden Rose.