Woodside Park Stud’s stakes winning mare Power Princess has died after failing to respond to treatment for an infected fetlock joint.

Power Princess (7m Marwina – All Electric by Canonise) was a Group 3 winner of the Scahill Stakes, Roma Cup and Prince of Wales Stakes in Perth and was Group 1 placed behind Black Caviar (Robert Sangster Stakes) and Barakey (Winterbottom Stakes).

She was retired after an unplaced run in the G3 Bellmaine Stakes at Caulfield in February and was due to be covered by first-season sire Zoustar in September.

“We treated her with antibiotics and sent her to the Werribee Veterinary Clinic but she was becoming more and more lame,” Woodside Park general manager Murray Tillett said.  “We were looking forward to her being one of our star mares and we’re just devastated.”