Many people consider a dog their best friend. But for more and more people, a dog is an athletic teammate as well as a buddy. The sport of dog agility is growing by -- well, leaps and bounds. The ...

Eyes ablaze with focus, the black-and-white dog heeds the start cue from her handler. She makes a jump, sprints up an A-frame, darts into a tunnel, shimmies through the weaves like a slalom skier, ...