CatDog (1998)

S1E13 Mush, Dog, Mush!

Cat decides to enter Dog in a lucrative sledding competition, setting up a winter training course in their home. As the race begins, Dog pushes through but soon succumbs to hypothermia halfway through. Feeling guilty for putting Dog in that position, Cat takes over and completes the remainder of the race on his own, ultimately leading the Greasers to victory.