Whitetail deer identify one another based on their tarsal glands, which secrete a fatty substance with a unique scent. That"s why it"s especially important to buy from Code Blue – you know you"re getting tarsal gland from a single whitetail deer. Many deer scent manufacturers try to get away with deer scents combined from several animals (or types of animals). with any Code Blue deer scent you can be confident you"re using the most realistic product available. Tarsal Gland Gel will lure big bucks who are ready to protect their territory, giving you a prime opportunity to take your shot.