• To Kill Cows means to end Human Civilization. S.B 1.4.9
• Killing of animals is a symptom of barbarian society. SB 1.9.26
• The basic principle of economic development is centered on land and cows. SB 1.10.4
• The cow is beneficial because one can draw religious principles from her. SB 1.17.3

Scriptures on Cow slaughter:

The mlecchas, however, make plans to install slaughterhouses for killing bulls and cows along with other animals, thinking that they will prosper by increasing the number of factories and live on animal food without caring for performance of sacrifices and production of grains. But they must know that even for the animals they must produce grass and vegetables, otherwise the animals cannot live. And to produce grass for the animals, they require sufficient rains. - Ref S.B.1.16.20

In the age of Kali, the women and the children, along with brahmanas and cows, will be grossly neglected and left unprotected They don't know that the overall value of the ox is greater when he is utilized for work than when he's slaughtered for meat.

The bull standing on one leg indicates that the principles of religion are gradually diminishing. Even the fragmental existence of religious principles will be embarrassed by so many obstacles as if in the trembling condition of falling down at any time

For a Sanatanist (a follower of Vedic principles) it is the duty of every householder to have cows and bulls as household paraphernalia, not only for drinking milk, but also for deriving religious principles. The Sanatanist worships cows on religious principles and respects brahmanas. The cow's milk is required for the sacrificial fire, and by performing sacrifices the householder can be happy.

The protection of the lives of both the human beings and the animals is the first and foremost duty of a government. A government must not discriminate in such principles. It is simply horrible for a purehearted soul to see organized animal killing by the state in this age of Kali.

Torturing poor animals clears the way to hell. The executive head must always be alert to the safety of the prajas, both man and animal, and inquire whether a particular living being is harassed at any place by another living being. The harassing living being must at once be caught and put to death, as shown by Maharaja Parikshit.