Agility
Agility is a fast pased team sport where dog and handler compete against the clock, course accuracy and other teams. 

Agility was first designed in England as a "half time" entertainment for a horse show. Needless to say it has had many changes and you can now compete in a variety of venues, just a few being, AKC, USDAA and NADAC.

While agility requires athletisim on the part of the handler and dog, most team levels can have success - whether it's a fun day with your sheltie, a first place or a new title.
American Kennel Club
United States Dog Agility Association
Pia
Weathermans Confetti
Murphy
Sage