Dried cow dung is used in havans and homams. Because the cow eats only grass and dry paddy and other green leaves and pure water with vegetables. The cow did not eat non-veg items. so, the dried cow dung is used. Verses of the Rigveda refer to the cow as Devi (goddess), identified with Aditi (mother of the gods) herself. The cow continued to be especially revered and protected among the animals of India.