[4][5] He and his wife Marcy Lafferty Shatner bought an 18-acre (7.3 ha) horse-breeding farm in Three Rivers, California, in 1979, that she named Belle Reve Ranch; they used it for Quarter Horses.

[7][8] When he later sought to buy more, the California seller referred him to a friend in Kentucky, horse breeder and trainer Donna Moore.

[8] Under Moore's direction, Shatner acquired the champion black American Saddlebred stallion Sultan's Great Day after seeing him at the Los Angeles Equestrian Center in 1985.

[16] In July 1999, Shatner sold the Shannon Run Road farm for approximately US$500,000 to the owner of Came the Son, another foal of Sultan's Great Day; she renamed it Rigby's Green.

[9] They divided their time raising Saddlebreds at the 360 acres (150 ha) Belle Reve Farm, and Quarter Horses in Los Angeles.

[25] The stallion roster includes the Champion Saddlebred, Call Me Ringo, who performed in harness at the 2010 Alltech FEI World Equestrian Games in Lexington.