Australian Shepherd, 15-18 years
Another breed in the herding category is the Australian Shepherd—one of the largest breeds on this list topping out at around 65 pounds. Despite being named the “Australian” Shepherd, the breed actually originated in the western United States, around the time of the 1840s Gold Rush.
Australian Shepherds are greatly associated with cowboys whether it be out on the land or inside at the rodeo. They have loads of energy they can’t wait to expend and are incredibly intelligent dogs—sometimes too intelligent. You can trust Australian Shepherds will be around outsmarting you for up to 18 years.