Miniature Australian Shepherd

Dog

The Miniature Australian Shepherd was developed by breeding smaller Australian Shepherds for the desired size. Miniature American Shepherds are rapidly increasing in popularity among those interested in a compact dog with a strong work ethic. They are especially popular in dog agility, and do well in other dog sports including herding, obedience, disc dog, and many other activities. They can serve well as service or therapy dogs.

http://en.wikipedia.org/wiki/Miniature_Australian_Shepherd