The Australian shepherd, commonly known as an Aussie, is a breed of dog that was developed on ranches in the western United States. Despite its name, the breed was not developed in Australia, but rather in the United States where they were seen in the West as early as the 1800s. The breed rose gradually in popularity with the boom of western riding after World War I. They became known to the general public through rodeos, horse shows, and Disney movies made for television.
For many years, Aussies have been valued by stockmen for their versatility and trainability. They have a similar look to the popular English Shepherd and Border Collie breeds. While they continue to work as stockdogs and compete in herding trials, the breed has earned recognition in other roles due to their trainability and eagerness to please, and are highly regarded for their skills in obedience. Like all working breeds, the Aussie has considerable energy and drive, and usually needs a job to do. It often excels at dog sports such as dog agility, flyball, and frisbee. They are also highly successful search and rescue dogs, disaster dogs, detection dogs, guide, service, and therapy dogs.
The Australian shepherd is a medium sized breed of solid build. They can be anywhere from 30–65 pounds and anywhere from 17–26 inches in height. The ASCA standard calls for the Australian shepherd to stand between 18–23 inches at the withers, females being 18–21 inches and males measuring 20–23 inches, however, quality is not to be sacrificed in favor of size.
Source of information: http://en.wikipedia.org/wiki/Australian_Shepherd
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