From the American Kennel Club website:
About the Swedish Vallhund
With their thick sable coat, sturdy construction, and overall no-frills look, Vallhunds are a timeless breed, as comfortable in a suburban backyard as they were on the prow of Viking longships 1,200 years ago. These lively herders are built long and low to the ground—in not quite as exaggerated a fashion as their distant cousins the corgis, but the idea is the same: Their build makes it easier to nip at the heels of cattle and avoid kicks to the head. Balance, power, and smooth movement are breed hallmarks.