<p>They are the natural droppings of cows, when they go on grazing in forest or on grazing lands, such cow dung cakes are called <em>Aaranyak</em>, meaning those which are not hand made and that which does not contain grass. They are 100% Natural. They get dry, where they are dropped. </p><p>They are exclusively used for <em>Yagnya</em> and for agnihotra. As per Ayurveda their are specific medicines, for whose cooking only <em>Aaranyak</em> are used. </p><p>They are best natural, traditional and effective fumigant for antiseptic purification of home and office, as they contain medicinal herbs. Few pieces of <em>Aaranyak</em> can be burned every morning and/or evening with help of camphor and experience the effect. </p><p>Traditionally cows are taken for grazing in forest or/and reserved grass lands called Gou char in Hindi or <em>Gay Ran</em> in Marathi. This is very scientific as cow get physical exercise, they feed on various types of herbs and the grass land get cow urine and dung for rejuvenation. </p>