Gomatha as the Cows are traditionally called in India is a sacred & miraculous animal. It just consumes grass and produces milk. In addition to that even the dung and urine of cow is antiseptic. Nothing of cow’s byproducts are a waste. Vedas celebrate cow as the resident of all the devatas and by worshiping and feeding the cow one can worship all the devatas. There is nothing that one cannot achieve by serving cows.