Hoofbeats of Vengeance

Rex, the Wonder Horse

Black Cyclone

Rex (as Rex the Wild Horse)

The King of the Wild Horses

The Black (as Rex the Wonder Horse)

Lightning Romance

A Horse (as Rex the Wonder Horse)

Rex the Devil Horse

The Devil Horse (as Rex - King of Horses)

Wild Blood

Rex, Mary's Horse (as Rex the Wonder Horse)

The Vanishing Legion

Rex

King of the Wild Horses

Rex (as Rex the Wonder Horse)

Plunging Hoofs

Rex (as Rex the Wonder Horse)

Parade of the West

Mankiller (as Rex King of the Wild Horses)

No Man's Law

Rex, a Wild Horse (as Rex the Wonder Horse)

Guardians of the Wild

Rex - a Wild Horse (as Rex the Wonder Horse)

Two Outlaws

Rex, a Horse (as Rex King of the Wild Horses)

Stormy

Rex (as Rex King of Wild Horses)

The Law of the Wild

Rex King of the Wild Horses

The Adventures of Rex and Rinty

Rex, The King of Wild Horses

Robinson Crusoe of Clipper Island

Rex, the Wonder Horse

King of the Sierras

Diablo

The Harvest of Hate

Rex, the World's Greatest Horse (as Rex the Wonder Horse)

Wild Beauty

Thunderhoof, a horse