Barko was once a great sled dog and "champion of all the North". However, as he reached old age, he became unwanted and stricken with rheumatism. He spent most of his retirement at a hardware store that used to rent/sell sled dogs. In the end, Scrooge got to keep his great fortune, while Barko and Poly Poly became famous animal heroes. Once again, Barko's potential was recognized thanks to Scrooge, and he reclaimed his title as the Champion of the North.