They require mental stimulation as much as they require physical exercise so activities such as earth dog trials, agility, tracking and fly ball are all high on a terriers list of favorites. (professorshouse.com)
He considers sheep dog trials as they currently stand to be detrimental to the breeding of good dogs. (campaspeworkingdogs.com)
They were relatively unknown until a succession of victories in dog trials by the breed increased its popularity. (dailypuppy.com)