An interesting 
Radiolab piece with evolutionary biologist 
Brian Hare on Russian geneticist Dmitri Belyaev's celebrated 
silver fox domestication experiment. Belyaev's foxes have gotten a fair amount of play in popular media - 
as a part of the origin story of dogs. (Here's something I'm starting to think about: the canids who make dogs dogs, so that dogs can, as the saying goes, make us human. Another example would be the captive wolves, human-raised or not, who stand in as the foil of dogs in studies of social cognition, 
for example these by Brian Hare.) 
What I  found most striking about the RadioLab version of the story: the cartoonish, disturbingly  repetitive gun shot sound effects that point up the role of 
culling in selective breeding (plus, these foxes were raised for fur in the first place...) 
Related posts on 
free-range dogs and 
undesireable dogs.

Image courtesy of 
http://www.gmilburn.ca/
Note: I tried posting an earlier version of this on Village Dog, my Tumblr experiment, but had some technical difficulties. It seems to fit better here, anyway.