Wildlife Research Golden Estrus Elk - 4 ounces - Wildlife Research Center Golden Estrus Elk is a fresh and extra premium cow elk estrus type scent. Using Golden Estrus Elk can be extremely effective during the rut and when bugling. The smell of a cow in heat is proven to drive bulls wild. Fresh and premium cow elk estrus Highly effective during rut and when bugling Smell of cow in heat drives bulls wild 4oz bottle