Female deer go in heat for only three days out of the month. The female deer used are penned up the day they are going into heat, the actual day they are in heat and then the last day they are going out of heat. This insures the richest and most powerful "Female Deer In Heat?" product on the market. Bucks will come quicker to the real scent of a "Female Deer in Heat?" and they will stay longer for you to have that shot of a lifetime.