Each of the dogs on the NATURE program is extraordinary in its own way. Here's a closer look at a few of them.

Chad, a teenager with cerebral palsy who lives near Seattle, relies on Twany, his German shepherd service dog, to help him get through the day.

Dogs' sense of duty, desire to please, willingness to follow commands, and strong bond with their owners make them good working partners and loving companions.

Dogs are anything but common animals. They develop lifelong bonds with the people. They instinctively know when a human or animal companion is in need of help.