[Lethe101]

They ate dog because the tribes they were visiting had little else: when in areas with other game, they preferred that.

Clark never ate dog, couldn't bring himself to break the cultural taboo.

In the dry areas of what is now eastern Washington, in fact, where there was little if any game and the only other choice was dried salmon, usually impregnated with sand, the men came to prefer dog.

http://news.nationalgeographic.com/news/2003/12/1204_031204_...