A girl engaged to a member of the Royal Mounted Police is forced to marry a vicious blackmailer after he gains incriminating evidence on her father.

A lawman, his dog and his trusty white stallion fight a gang of outlaws.

A Canadian Mountie follows a fugitive to a small fur-trapping community. Most of the action is handled by Chinook, a handsome German Shepherd.

A fire in the mountains drives a wolf pack into the nearby desert where they terrorize the local residents. The leader of the wolf pack is Lobo, actually a halfbreed (Rin Tin Tin). When the pack is discovered hunting a herd of cows, a posse gives chase. Lobo leaves his pack to lead the posse away. He is injured and found by a local prospector, Dave Weston (Charles Farrell). The prospector nurses Lobo back to health and the two become close friends. Meanwhile, Weston has made a Borax find in the area. His girlfriend May Barstowe (June Marlowe), daughter of a wealthy rancher, is pleased. However, the local chemist, Borax Horton (Pat Hartigan), actually a claim jumper, plans to steal the claim.

A stray German shepherd, a runaway teenage boy, and a runaway teenage girl end up at her uncle's place in Oregon, where an epidemic of sheep rustling is under way.

Counterfeit bills are being printed in Canada and shipped across the border hidden in blocks of ice. When the counterfeiters force engraver Bronson to make a new plate, he inscribes a tiny help message on it. Renfrew catches a henchman who has one of the new bills. A magnifying glass lets him read the message and he heads out alone to round up the counterfeiters.

Kazan, a dog who reverts to the life of the wild when his master is killed, becomes docile when he develops a loyalty to a girl in distress.

A working-class kid is mistaken for a rich American boy and is kidnapped by two criminals.

A pair of crooked deputies steal a gold shipment, murder a young boy's father and pin the blame on a cowboy. The murdered man's son and his dog set out to prove the cowboy's innocence.

A Mexico/United States border patrol officer is aided by his police dog, Rinty.

Sergeant Ken Strange, of the Canadian Mounted Police, and his dog, King, are on the trial of the murderer.

When a man is wrongly accused of murder, a dog helps clear his name.