Claiborne Farm stallion Boundary has been retired from stud duty due to declining fertility, said Bernie Sams, farm spokesperson. The 15-year-old son of Danzig out of the Damascus mare Edge has sired 16 stakes winners, 48 stakes horses, and the earners of more than $21 million during his career. His leading runners include: Minardi, 2000 champion 2-year-old in Ireland; Pomeroy, record-setting winner of 2004 King's Bishop Stakes (gr. I); Conserve, multiple grade II stakes winner of $638,142; and a trio of millionaires in Japan.Boundary was bred and raced by the partnership of the Hancock family's Claiborne Farm and William H. Perry's Gamely Corp. He won six of eight lifetime starts including the 1994 A Phenomenon Stakes (gr. III) and the Roseben Handicap (gr. III).Boundary entered stud at Claiborne in 1995, with his first crop of foals arriving in 1996.