A dog and a horse become unlikely allies when they attempt to thwart a crooked gambler from rigging a race.
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.
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.
Danny Mitchell and his canine pal Rusty befriend blind girl Penny Moffatt. Feeling cheated by life, Penny resists all efforts to cope with her handicap. But with Rusty's help, the girl gains a new lease on life and agrees to adopt a seeing-eye dog.
Gary and his dog Pal are having fun working on make-believe crime cases, though Gary's father, a city detective, disapproves. Gary and Pal soon find themselves involved in a real case involving fur thieves.
The story of a champion Eskimo 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.
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.
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.
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.
The Laguna Dam is to be built in Arizona to supply water to desert-land unfit for cultivation or stock-raising. Rival companies bid for the building contract, which leads to violence and danger for Bob Owen and his dog Satan.
A 12 episode serial starring Rex, the King of the Wild Horses and Rin-Tin-Tin, Jr. Rex is brought from the island of Sujan, where he is worshiped as a God-Horse, to the U.S. to be trained as a polo pony. He escapes, meets Rinty and with the help of Frank Bradley is returned to Sujan. The natives have been persuaded to turn against their God-Horse, however he is rescued just in time before he is burned as a sacrifice.
Rin-Tin-Tin brings the killer of his mistress to justice.
A fur trapper catches another trapper trying to steal his furs. He stops the thief, but later on the furs are stolen anyway. Rin Tin Tin Jr. tracks down the thief to try to get the furs back.
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 dog is stolen from his home in England and shipped to Canada to become a sled dog. Based on the novel by Jack London.
A Mountie and his dog must bring in his wanted brother.
Two German shepherds and their mistress (Grace Bradley) crash-land in Canada by a fox breeder's (Michael Whalen) farm.
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.
Gabe and Kylie hunt for lost pirate treasure, hoping to bring tourists to their sleepy Florida town — and save Gabe’s mom’s diner. When they find a precious sapphire, they’re helped by R.A.D.A.R., a clever dog who’s actually a robot! But the mad scientist who invented the treasure-hunting dog wants to steal him back — along with the town’s famous sapphire! Can Gabe and Kylie protect the dog, guard the jewel, and save the town?
Bud Taylor loves Mary Stoddard but is leaving for Alaska in search of gold, leaving a police-dog pup with her that he has named "Phantom." Wade Burton is anxious to win Mary and her father's money. Later, Wade follows Bud to Alaska and attempts to claim-jump Bud's gold strike, but is foiled by Bud and "Phantom."