This is a fascinating paper written by Janice Koler-Matznick on some less familiar theories of the origin of the dog.
"The most widely accepted hypothesis of the origin of the dog, Canis familiaris, is that the dog is a domesticated gray wolf, Canis lupus. This paper reviews the evidence for this conclusion, finds many unanswered questions and conceptual gaps in the wolf origin hypothesis, and explores the alternative hypothesis that the most likely ancestor of the domestic dog was a medium-size, generalist canid."
For the complete paper, visit http://newguinea-singing-dog-conservation.org/Tidbits/OriginOfTheDog.pdf
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