Big or small, any dog can participate in agility training. But, some breeds are better suited to the task, enjoying the fun of zipping through tunnels, leaping onto seesaws, and jumping over poles.

Smaller-scale brainy dog breeds can appeal to prospective owners wishing for a quick-learning canine of a manageable size. Mary Burch, Director of the American Kennel Club (AKC) Family Dog Program, ...