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.
This movie contains 18 potentially triggering events.
Maybe. The main dog does not, but the fate of his team is unclear. They were in a situation where they would have died off screen but the evil turd who put them in that situation says his dogs "ran off". Either way, the final time you see them is heart breaking.
Many of the sled dogs on the team are devastated that their owner sold them off to an evil man to run their sled team. And it is heartbreaking when the man pushes the team far past their limits as they carry an excessive amount of the man's belongings up a hill.