After four fur trappers are slain and their furs stolen, Corporal Rod Webb of the Royal Northwest Mounted Police sets out for their village. En route, he and his German Shepherd, Chinook, encounter another trapper, Henri, unconscious on the trail, and the furs he was delivering to the factor, McTavish, stolen. Chinook trails the would-be-killer and bites a piece of cloth from his coat before he escapes. Webb leaves Henri with Greta while he investigates, aided by an Indian servant and the, wife of the superintendent of the trading company that employs McTavish.
A lawman, his dog and his trusty white stallion fight a gang of outlaws.
A working-class kid is mistaken for a rich American boy and is kidnapped by two criminals.
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.
Jed and his dog Lightning contend with the boy's abusive father.
A German Shepherd puppy is "adopted" by a wolf pack in the snowy and frozen Great North and raised by them as one of their own. A few years later he comes upon a fur trapper and saves the man from certain death, and begins to feel a kinship with him that is stronger than the one he has with his adopted pack.
Rin-Tin-Tin is saved from the beatings of a trapper by Ed Nolan, a shiftless trapper himself, and 'Rinty" follows Nolan home to his cabin but refuses to enter. Nolan takes him to the home of Mary Mallory, the girl he has failed to win as his wife because of his ways, and in their mutual love of 'Rinty," a new understanding is born and Nolan goes to work.
Rinty is a police-dog assigned to a young Scotland Yard police-officer who covers the Limehouse district of London.
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 woman and her weakling brother inherit a mine. When the brother commits suicide the guide is accused of murder.
Valo, who recently moved to Raahe, gets bullied. After rescuing an abandoned dog, Valo finds a friend in it, whom she names Roi. Together, the friends end up investigating the mysterious disappearance of a neighbor boy.
Jimmy lives in the tranquil town of Eagle Rock, Louisiana, with his father, stepmother and his best friend Rainy, a German Shepherd. When Jimmy's father gets a promotion, the family must relocate to an apartment in New York City that has a strict no pet policy. Unwilling to let his master go without a fight, Rainy embarks on a cross-country journey to New York but navigating the Big Apple is just the beginning of his challenging adventure.
A boy tries to protect his dog, a German shepherd that served with U.S. Army forces after it begins attacking strangers several years after the war.
The disinherited nephew of an aviation magnate plots to get a share of his uncle’s millions. He causes the near-death of his cousin when a bomb placed in his plane explodes in mid-air. He then hires thugs to abduct the uncle in order to force him to give over part of his fortune, but is foiled by the arrival of a cousin and police.
In his dedicated pursuit of technology that will aid pilots to safely "fly blind" during adverse conditions, aerial innovator Ken Gordon is literally blinded in an accident, but this setback doesn't deter him from his goal.
In a 1990s Hungarian town, tram mechanic Zoltán secretly inherits a hyperactive German shepherd puppy, “Mancs,” which he trains into a rescue dog in his spare time. As Mancs grows into Zoltán’s pride and joy at their new mountain home, Zoltán’s lies about the dog strain his marriage and land him in trouble at work.
Fearing that his recently-acquired step-mother, Ann Dennis, is competing with him for his father's affections, and saddened by the death of his dog, young Danny Mitchell seeks consolation in the companionship of a ferocious, Nazi-trained police dog, Rusty, brought to the U.S. by a returning WWII-veteran. The step-mother, with tender understanding, eventually wins Danny over while Danny pacifies his new dog.
The story of a champion sled dog named Kavik who survives a plane crash in the wilds of Alaska and is found and cared for by a young boy named Andy Evans. But the dog's owner finds Kavik and takes him back to his home in Colorado where the dog escapes and embarks on a 2,000-mile odyssey in search of Andy.
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.