Sandpiper is his famous sire's only documented offspring as Phantom Wings died in 1964. He was out of a mare named Nora and is listed in the family tree in A Pictorial Life Story of Misty. The Walker family encountered Phantom Wings's band and noticed a mare whinnying for help. They found Sandpiper tangled in a fence on a sandbar and soon to drown in the rising tide. Nora returned to her herd as they freed her colt. The family nursed Sandpiper back to health. The family tried to return him to Phantom Wings's herd, but the colt kept following them so he returned to their farm with them. Sandpiper got his name from the sandbar he was found on and his grandsire Pied Piper. The Walker's offered him for sale in March 1967. Sandpiper lived with the Walker's of Bar-W Ranch on Ridge Road on Chincoteague where he gave pony rides and greeted visitors.