Cow History
To teach by example, Sri Krishna and Lord Balram show us when They descend into this world, how important is to protect, love and serve Cows and Bulls. Krishna is known as Gopala (protector of the Cows) or Govinda (one who gives pleasure to the Cows). Lord Balram represents plowing the land for agriculture and therefore always carries a plow in His hand, whereas Krishna tends Cows and therefore carries a flute in His hand. Thus the two brothers represent krisi-raksha (protecting Bulls by engaging them in farming) and go-raksha (protecting the Cows). 10.5.20 Purport
Kamadhenu's complexion is like the white clouds. Every part of cow's body has a religious significance. Its four legs symbolize the four Vedas, and its teats the four Purusharthas. Its horns symbolize the gods, its face symbolize the sun and the moon, its shoulders Agni (the god of fire), and its legs the Himalayas
Kamadhenu is also well-known through its other five forms: Nanda, Sunanda, Surabhi, Susheela and Sumana.

The cow symbolizes the dharma itself. It is said to have stood steadily upon the earth with its four feet during the Satyug (world's first age of truth), upon three feet during the Tretayug (the second stage of less than perfection), upon two feet during the Dwaparyug (the third stage of dwindling and disappearing perfection) and only on one leg during Kaliyug (the fourth and current age of decadence).
Important aspect of Cow is that it is an integral part of the lives of our rural brethren who form more than 70% of the country's population. Morning to evening, most of the activities of the people engaged in agriculture, revolves around cows and bullocks. Cow dung, urine and milk are essential for any agriculturist.
Indian cows are unique in their ability to resist diseaaes, possess characterisitics, suited to the Indian Agro-climatic conditions, and they have tremendous draught resisting capacities and can walk 24 hours without rest. These qualities are often found lacking in mixed breeds.
Goseva means serving the cows.
Bhagavat Geeta describes how Lord Krishna cared for the cows and calves every morning, by taking them to graze on the Govardhana hill. We should also try to serve the cows with similar attitude - by providing means for their food, shelter and medication.