Told by a fighting dogs point of view view

When Milo the cat and Otis the dog are separated, they each set off on an adventurous and often perilous quest across mountains, plains, and snow-covered lands to reunite with one another.

Before the Seavers leave for a family vacation to San Francisco, they drop off their pets -- Chance, an adventurous American bulldog; Shadow, a wise golden retriever; and Sassy, a cautious cat -- at a friend's ranch. But when the animals start to worry that they've been left for good, the three embark together on a treacherous and thrilling journey to find their way back home through the California wilderness.

In the Antarctic, after an expedition with Dr. Davis McClaren, the sled dog trainer Jerry Shepherd has to leave the polar base with his colleagues due to the proximity of a heavy snow storm. He ties his dogs to be rescued after, but the mission is called-off and the dogs are left alone at their own fortune. For six months, Jerry tries to find a sponsor for a rescue mission.

In the future, an outbreak of canine flu leads the mayor of a Japanese city to banish all dogs to an island used as a garbage dump. The outcasts must soon embark on an epic journey when a 12-year-old boy arrives on the island to find his beloved pet.

When London gangland boss Darius Deel discovers his new trophy-wife Nadia is having an affair, he hunts down her lover Riley and a deadly game begins.

Buck is a big-hearted dog whose blissful domestic life is turned upside down when he is suddenly uprooted from his California home and transplanted to the exotic wilds of the Yukon during the Gold Rush of the 1890s. As the newest rookie on a mail delivery dog sled team—and later its leader—Buck experiences the adventure of a lifetime, ultimately finding his true place in the world and becoming his own master.

John Thornton, is a fearless man who's after more than gold; he wants to do what's right. Thornton works for the U.S. mail and is the only person daring and smart enough to figure out how to travel the deadly 600 miles from Skagway to Dawson, Alaska in the icy winter. His incredibly dog Buck is by his side and part of how he survives.