All dogs are involved in agility as they offer five jump heights. The most popular breeds at this time are Shetland Sheepdogs, Belgian Tervurens, Border Collies, Golden Retrievers, Labrador Retrievers, Cocker Spaniels, and Papillons. All-American Dogs (mixed breeds) are also eligible to compete. Whats the Best Dog Breed for Agility? All dogs, including your dog, can participate in Agility including All-American mixed-breed dogs.