This clip has little, if any, well OK, nothing to do with Thanksgiving. But it does feature Native-Americans, or animated stereotypical versions of them. Does that count?
This is an early installment of the Gumby TV series featuring creator Art Clokey's clay characters. In this segment, Gumby and Pokey help an American Indian hoping to summon the Rain Spirits to help corn grow for his tribe. The clay animation seems at once both crude and innovative. It lacks the slickness of Wil Vinton's Claymation characters, such as the California Raisins, but also uses the tools and effects of the time quite impressively. Enjoy!