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.

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

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 Rin-Tin-Tin serial presented in 12 episodes. The mysterious Wolf Man is terrorizing settlers in a western town. With the help of Rinty, young Jimmy Carter unmasks the Wolf Man and foils his evil plot.

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.

The Three Mesquiteers are forced to track down a train robbery ring after some of the gang hijack their truck for a getaway and the police conclude they are part of the gang, an identification which is just fine with the gang's nameless chief.

While the original title, "Trailing the Killer" isn't a misnomer, it was a bit misleading since the "trailer" is a dog named Caesar (Caesar the Dog) and the killer is a mountain lion. But the makers also pointed out that Caesar "is the most intelligent dog actor since Rin-Tin-Tin" which probably lured a few Rin-Tin-Tin fans with a show-me attitude. Caesar prowls around the woods of the Northwest, dispatches a rattlesnake, visits his she-wolf mate and their pups, pauses to watch the dainty habits of a raccoon personally washing every morsel of food before eating it---and that raccoon had enough food to use up several minutes of running time---and then saves sheepherder Pierre (Francis McDonald)) from getting eaten by one mean mountain lion. Rin-Tin-Tin he ain't, but then who was?

The 101st Cavalry discover the survivors of an Apache raid on a wagon train. Feature film from The Adventures of Rin Tin Tin TV show.

Dynamite -- Universal's answer to Warner Bros.' canine star Rin Tin Tin -- and his owner Jerry Matthews (Edmund Cobb) come to the aid of a beleaguered rancher in this typical low-budget "doggie melodrama" set in the West.

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.

Daredevil flyer David flirts with a waitress. An orphan accidentally takes off in a biplane requiring an aerial rescue. The villain reports a fake robbery and turns the orphan in to welfare workers, but a loyal dog saves the day.

A man is suspected of robbery and murder and aided by his horse and dog.

Molly O'Day and her brother, Josh, are homesteading on and trying to make a living on a piece of government land, but local rancher Dave Crenshaw claims the land is part of his holdings, and he and his henchmen try to drive the O'Days off. Cowhand Jerry Wilson and his dog, Dynamite, come to their aid against Crenshaw.

A cowpuncher is out for revenge on the gent who seduced his sister into a dance hall by advertising for a school teacher and then finished her off before he blew town. Rex the Dog and Starlight the Horse do their part in Jack Perrin's victory over the villain and his assistant.

Silent western starring Wolfheart the dog. A band of settlers on the Oregon Trail is attacked by outlaws, who steal their horses. The horses are returned and the outlaws chased off by three cowboys who just happen to pass by. Years later, the three cowboys again save the settlers when they are threatened by some rebellious farm-workers.

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

In a small western town, a man meets a girl whose father is a land agent. To please her, he buys a plot of land from her father. Next thing he knows, he's mixed up in a plot to drive him off his land.

Based on the novel by James Oliver Curwood about Kazan, the wolfdog.

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.