Not all whitetail lures are created equal. When purchasing any whitetail lure it's wise to ask a few questions of the vendor. If the lure is urine-based, it's important that it has been collected recently -- generally no more than several months before you'll be using it. Ask if the formula has been kept refrigerated, which extends the life of urine-based lures. Also find out if non-whitetail ingredients have been used in the product, since non-whitetail urines, oil of anise and other products are sometimes used in certain lures without the consumer's knowledge. In my experience, these mixtures are inferior to pure whitetail concoctions.