[PatrickHenry]

Website with related background info: the farm-fox experiment.

[KarlInOhio]

I saw a show about this once. The scientists haven't figured out why the tameness of the animals is related to the change in coloration but it seems to occur every time.

[KarlInOhio]

I think this is the same article, but the full text instead of a teaser trying to get you to sign up for a paid service:

http://home.wlu.edu/~blackmerh/jsk/canid.htm