Actual predator urine is highly effective, but it is expensive to purchase and very unpleasant to use. Also, urine breakdown occurs naturally, immediately, and in 24 hours will advertise that a predator was present but is no longer around, requiring daily re-application of urine in order to mimic nature with the predator being present. Deer Banâ„¢ contains the minerals of the predator that a deer will detect, but the ingredients in urine that breakdown (which advertise an old urine spot) have been removed in the manufacturing process. This means Deer Banâ„¢ will continue to remain effective for weeks, advertising a â€œfreshâ€ urine spot from the predator being present in the area. Continuously!