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.

Adapted from Dorothy Yost's story, "The Untamed Heart"

Our doggy hero is abandoned in the desert while in pup-hood. Upon reaching maturity, Tin Tin has undeservedly earned the reputation as a killer canine. Thus, the human characters spend most of their time hunting down the dog in hopes of collecting a huge bounty.

Bill's separated from his litter, making friends with the wild creatures until he's found and adopted by young Kathie. An accident separates him from her, and he's drafted into K-9 duty in the trenches until battle fatigue takes its toll and he turns vicious. And even though he finds his way back home, he may be condemned as a killer.

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.

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

A drama of the Korean War. Four American Army POWs escape behind enemy lines and try to make their way back to their units in the South. Along the way they are aided by a young Korean boy and his adopted dog, a US trained German Shepherd named Lobo.

An orphan boy on his way to live with his uncle picks up a stray dog, and the two become fast friends. However, the uncle doesn't want the dog, and when chickens are found dead, the uncle accuses the dog of killing them. The boy decides that it's time he and the dog hit the road so they run away, and meet up with an elderly man who also ran away from a home where he believed he wasn't wanted either.

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

A young boy goes to desperate lengths to save the family dog when his father agrees sell it to the local butcher.

When his master is attacked and left speechless, Ranger is held responsible. On the lam from the Law, the canine hero links up with telegrapher Bill Brady and Bill's girlfriend Helen Meadows. He gets a chance to clear his name by helping Bill trap a pair of outlaws who plan to blow up a mail train and abscond with the loot.

David thinks he has killed a man during a fight over his dog, Strongheart, so he escapes to a small town far up north. The only girl living up there is an orphan, Sally, and David falls in love with her. Strongheart decides to search for love himself and lures Lady Jule, a female shepherd, away from a pack of timber wolves.