
Hard-Wired?
Clip: Season 25 Episode 12 | 3m 8s
Genetics and brain physiology can affect a dog's personality and behavior.
Genetics and brain physiology can affect a dog's personality and behavior.
Major support for NATURE is provided by The Arnhold Family in memory of Henry and Clarisse Arnhold, The Fairweather Foundation, Sue and Edgar Wachenheim III, Charles Rosenblum, Kathy Chiao and...

Hard-Wired?
Clip: Season 25 Episode 12 | 3m 8s
Genetics and brain physiology can affect a dog's personality and behavior.
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Bring the beauty and wonders of wildlife and natural history into your home with classic NATURE episodes.Dogs That Changed the World (Part 2) - Preview
Airs Wednesday, October 9, 2011 at 8:00 p.m. ET/PT. Check your local listings. (30s)
Major support for NATURE is provided by The Arnhold Family in memory of Henry and Clarisse Arnhold, The Fairweather Foundation, Sue and Edgar Wachenheim III, Charles Rosenblum, Kathy Chiao and...