Like all Yorkies, Kirby carried himself with an air of importance. The small body and short legs common to all toy terriers in no way detracted from his sense of self-importance or his erect stance and ears. A true earth dog, Kirby lived out the urges of a great hunter whose ancestors had been bred to catch small mammals like rats and foxes, often by following them into their earthen dens. His small eyes always snapped with excitement and nothing in his life quite matched the sport of a chase.
Granade, S. Ray, "Kirby and the Mouse" (1998). Creative Works. 1.