"First and foremost, the Australian Shepherd is a true working stockdog, and anything that detracts from his usefulness as such is undesirable... He is attentive and animated, showing strength and stamina combined with unusual agility... The Australian Shepherd is primarily a working dog of strong herding and guardian instincts. He is an intelligent, exceptional companion. He is versatile and easily trained: performing his assigned tasks with great style and enthusiasm. He is reserved with strangers but does not exhibit shyness."

-ASCA Breed Standard