Why We Love Cats and Dogs

Season 27 Episode 8 | 53m 10s | Video has closed captioning.

Americans own 73 million dogs and 90 million cats. They become best friends, soul mates, family members -- even surrogate children. Relationships with cats and dogs are some of the longest and most intimate of our lives. Why are we so attached? Animal behavior experts, evolutionary biologists, veterinarians, and pet owners share insights and observations about these animals and their impact on us.

Aired: 02/14/09

Rating: TV-PG

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Major support for NATURE is provided by the Arnhold Foundation, The Fairweather Foundation, Kate W. Cassidy Foundation, Sue and Edgar Wachenheim III, Kathy Chiao and Ken Hao, Charles Rosenblum, Filomen M. D’Agostino Foundation, Lillian Goldman Charitable Trust, Leonard and Norma Klorfine, Sandra Atlas Bass, Colin S. Edwards, Gregg Peters Monsees Foundation, Koo and Patricia Yuen, The Hite Foundation, the Bradley L. Goldberg Family Foundation, The Sun Hill Family Foundation, The Arlene and Milton D. Berkman Philanthropic Fund, by the Corporation for Public Broadcasting and by Viewers Like You.