Ben Masters on Instagram: "It took a full month to film an epic battle between two huge bulls for “The American Southwest.” We filmed at Rocky Mountain National Park, the headwaters for the Colorado River. We called our primary bull “Pretty Boy,” although he’s known to the locals as Kahuna Jr. Pretty Boy usually had several dozen cows with him, and would try to herd them away from any type of conflict. But near the end of the shoot, @ryan.forktailed was by himself with Pretty Boy and the herd wh