Time Release Doe Estrous Scrape Scent with Soil FormulaCode Blue Grave Digger Doe Estrus Urine contains soil impregnated with Code Blue&';s From One Deer to One Bottle doe estrous formula. Shake it onto scrapes or mock scrapes for lasting attraction. The time release scent lasts up to 30 days. Includes doe estrous formula Soil impregnated delivery system Use on scrapes or mock scrapes Easy shake on application Lasts up to 30 days