Can cats be "trained"? These talented felines can navigate an agility course.

(Airs Sunday, May 23) Are you cat-crazy or a dog die-hard? Watch as NATURE shares the stories of pet owners and their beloved animals.

Strong-willed Herbie takes a lesson in obedience.

The poignant story of two misfit dogs whose lives were turned around by people who saw their potential for greatness.

Americans own 73 million dogs and 90 million cats. Why are we so attached? Watch the full episode now.

Your pet is a member of your family, and there are things you know about your cat or dog that no one else would ever guess. Now it's time to spill!

The results are in! Check out the winners and runners-up in NATURE's Why I Love Cats and Dogs Photo Contest.

When their dog Jerry became ill, Jim and Rene decided to sell their business and their house -- and they hit the road with Jerry.

There are little pink pigs, ferocious hairy tuskers, and all manner of pigs in-between. Watch the full episode online.

Jim Nelson and René Agredano dropped everything to travel with their dog, Jerry. To get Jerry's full story, NATURE spoke with René in February 2009.