When you want pure estrous urine and nothing else, choose Code Blue Whitetail Doe Estrous. Featuring Code Blue's proprietary From One Deer to One Bottle process, where urine is collected from an individual deer, this whitetail doe estrous is guaranteed to be 100% pure. A buck can only trail one deer at a time, so with this Code Blue doe estrous, you'll get unmatched true-to-life effectiveness that rutting bucks can't resist. The amber glass bottle locks in the doe estrous buck attractant to keep it fresh and potent and is labeled with the deer's unique registration number.