As any Border Collie owner (*raises hand*) can tell you, to describe them as "high energy" is modest at best. Bred as herding dogs, they required near constant activity and attention because if they aren't "working," they aren't happy.
Most dog-owners flush with pride if their canines perform a trick for a treat, but Chaser the border collie has learned over 1,000 words for his toys. Don't believe me? There's video below.