Code Blue Grave Digger Doe Estrous Deer Attractant contains soil impregnated with Code Blue's unique From One Deer to One Bottle doe estrous formula. Shake Grave Digger Doe Estrous onto natural scrapes or mock scrapes to drive bucks wild, and keep them frequenting the scrape at an increased rate. Grave Digger Doe Estrous Deer Attractant stays effective on the scrape for up to 30 days, and it is effective in freezing temperatures.