The Wildlife Research Center Special Golden Estrus Deer Attractant contains fresh and super premium whitetail doe urine with estrus secretions. This deer attractant was originally available exclusively to hunting industry insiders. Each bottle of deer attractant is labeled with its own "Use By" date. Not only will this deer attractant attract deer, but it will camouflage human odors that would normally drive them away. The deer attractant is collected only weeks before it's shipped to you so you know it's fresh!