“In her book Hollywood Hoofbeats: Trails Blazed Across the Silver Screen (BowTie Press, 2005) author Petrine Day Mitchum mentions that Duncan Renaldo's paint horse Diablo was owned by Ralph McCutcheon. The horse named Diablo shows up in many 1940s westerns. Examples: Bob Wills rides Diablo in the Russ Hayden SADDLES AND SAGEBRUSH (Columbia, 1943) and THE VIGILANTES RIDE (Columbia, 1944). Charles Starrett's singing saddle pal Tex Harding rode Diablo and you can spot him in RETURN OF THE DURANGO KID (Columbia, 1945), BOTH BARRELS BLAZING (Columbia, 1945), and BLAZING THE WESTERN TRAIL (Columbia, 1945). In the Cisco Kid adventures, THE GAY AMIGO (United Artists, 1949) and THE DARING CABELLERO (United Artists, 1949), Duncan Renaldo rides this horse. In Gene Autry's THE STRAWBERRY ROAN (Columbia, 1948) and THE BIG SOMBRERO (Columbia, 1949), Diablo appears in both, ridden by Gene in ROAN and by George J. Lewis in SOMBRERO.”