Continuity mistake: When the bear falls through the ice, it leaves a gaping hole. Once Balto slips under, an overhead shot reveals that the hole that the bear left in the ice is gone.
Balto (1995)
Ending / spoiler
Directed by: Simon Wells
Starring: Kevin Bacon, Jim Cummings, Bob Hoskins, Bridget Fonda
Answer: He has an arrogant, power-hungry personality. As the situation with the medicine gets worse, he doesn't want to lose admiration from the humans and other dogs.