Rocky Mountain Bighorn Sheep are excellent rock climbers. Their hooves are hard at the outer edge and spongy in the center, providing excellent traction on sheer rock. Both rams and ewes have horns that they keep throughout their lives. Ram horns can weigh up to 30 pounds and are used against each other to assert dominance in their social groups, consisting of two to five rams. Ewes live in separate herds along with their young. 1.375″ Hard enamel pin; gold metal.