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NATURE

Dogs That Changed the World: Dogs By Design

  • Aired: 04/29/2007
  • 52:59
  • Rating: NR
The second hour of "Dogs That Changed the World" details the explosion of the basic working dog types into the roughly 400 breeds known today; explores concerns about today’s competitive breeding and its effect on dogs’ health and well-being; and outlines dogs’ potential role in medical care for human beings.
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Dogs That Changed the World: Dogs By Design
The explosion of dog types into the roughly 400 breeds and dogs' role in medical care.
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