Bred by Robert J. Kleberg Jr. of the renowned King Ranch, she was sired by the 1958 Belmont Stakes winner, Cavan.
Her mare was New weapon, a daughter of the 1936 Kentucky Derby and Preakness Stakes winner, Bold Venture.
[1] Considered unlikely to be successful in racing due to a severe "toeing in" problem, she was put up for auction at the September Keeneland Sales.
Under Laurin's care, Miss Cavandish raced at age 2, showing her ability when she narrowly lost the Gardenia Stakes.
[2][3][4][5] Miss Cavandish finished second in the balloting for 1964 American Champion 3-Year-Old Filly honors behind future U.S.