Young Idea was bred by Percy Miller Kia Ora StudScone and was sold for 500 guineas to owner A.G. Hunter. Percy Miller later purchased a half share after the sale and in 1936 purchased A.G.Hunter's half share holding when transferred to trainer Jack Holt and retired to Kia Ora Stud in 1939.[3][4][5][6]
Sire Constant Son (GB) sire of 10 stakeswinners began stud duty in Australia in 1930 as a two-year-old won the Arlington Stakes at Newmarket and later the Derby Gold Cup 1¾ miles. Grandsire Son-in-Law was the leading sire in the United Kingdom in 1924 and 1930. Major wins being the 1914–15 Jockey Club Cup and 1914 Goodwood Cup.[7][8][9]