Indyanne, the graded-stakes-winning filly owned by John Sikura, was euthanized on Tuesday after breaking a sesamoid bone in her left front ankle in the Grade 1 La Brea Stakes at Santa Anita on Dec. 27, Sikura said.\nSikura said that the 4-year-old filly was suffering from a lack of blood to her injured foot, and that equine doctors could not perform surgery on the injury.\n"We did everything we could," Sikura said in a release. "It was unfair to continue treatment in a manner that would have been inhumane to this courageous mare. . . . We did all we could and feel awful about the result."\nIndyanne won her first four starts, including the Grade 3 Azalea Stakes in July. After winning the Grade 3 Thoroughbred Club of America Stakes in October at Keeneland, Sikura bought the filly for a reported seven-figure sum from David and Jill Heerensperger. She was leading in the La Brea Stakes with an eighth of a mile to run when she broke down.\nIndyanne, a daughter of In Excess, had a record of five wins from eight starts with earnings of $449,870.\nCorrection: An earlier version of this article misstated Indyanne's age. She was 4 at the time of her death, not 3.