Importance of cow and her protection
Quotes from the scriptures
Protection of Cows is the single-most important principle towards saving the whole world from both moral and spiritual degradation. Simply by protection of Cows all the wonderful benefits of religiosity and piety will be automatically achieved without any separate endeavor. This is because Cows are as beloved to the Supreme Personality of Godhead, Lord Krishna, as even saintly brahmanas.
In scriptures it is said, namo brahmanya-devaya go-brahmana-hitaya ca jagad-dhitaya krsnaya govindaya namo namah, "My Lord, You are the well-wisher of the Cows and the brahmanas, and You are the well-wisher of the entire human society and world." (Visnu Purana 1.19.65) Lord Krsna, the Supreme Personality of Godhead, is the prime protector of brahminical culture and the Cow. Without knowing and respecting these pleasing personalities, one cannot realize the science of God, and without this knowledge, any welfare activities or humanitarian propaganda cannot be successful. SB 4.21.38 purport
For the Cowherd men and the Cows, Krishna is the supreme friend. His pastimes in Gokula, His dhama, are always favorable to the brahmanas and the Cows. His first business is to give all comfort to the Cows and the brahmanas. In fact, comfort for the brahmanas is secondary, and comfort for the Cows is His first concern. Because of His presence, all people would overcome all difficulties and always be situated in transcendental bliss. SB10.8.16
Krishna says in Srimad Bhagavatam, “I can be worshiped within the Cows by offerings of grass and other suitable grains and paraphernalia for the pleasure and health of the Cows, and one may worship Me within the Vaishnavas by offering loving friendship to them and honoring them in all respects.” SB11.11.43
Human society needs only sufficient grain and sufficient Cows to solve its economic problems. All other things but these two are artificial necessities created by man to kill his valuable life at the human level and waste his time in things which are not needed. Lord Krishna, as the teacher of human society, personally showed by His acts that the mercantile community, or the vaisyas or business or trading community, should herd Cows and Bulls and thus give protection to these valuable animals. According to smrti regulation, the Cow is the mother and the Bull the father of the human being. The Cow is the Mother because just as one sucks the breast of one's Mother,