A Synthetic dominant urine and gland formula, this one is for the Big Boys! For use in our "synthetics scrape system" during the rut. BF Rut, with it's extreme sent attractants will pull in mature bucks and estrus does quickly, from a considerable distance. We suggest you switch from Pre/Post, to BF Rut formula, in your mock scrapes, 10 days before the peak of the rut in your area.