|The Australian stumpy tail cattle dog is also known as the stumpy tail cattle dog, stumpy tail, and stumpy|
Stumpies are medium in size, ranging between seventeen and twenty inches in height. The breed is what you would expect from a herding breed: active and intelligent. Aiming to please, they learn quickly. They also tend to be wary with strangers and quite loyal to their owners. However, aggression isn't allowed as, according to the standard, the dogs must be able to be examined by a judge. As for the breed's health, a number of issues can occur. These include deafness, elbow dysplasia, progressive retinal atrophy, and hip dysplasia.
I do find it quite interesting that the blue coloration seen in this breed has been attributed to early breeding to merle collies, when the "blue" in the stumpy and the "blue" that is merle have completely different genes that cause them.
Sources are the Fédération Cynologique Internationale, United Kennel Club, Australian National Kennel Council Ltd, Canada's Guide to Dogs, and Australian Stumpy Tail Cattle Dog Club of NSW Inc. Image is from Wikimedia Commons under a Creative Commons license.