I assume you are a Hindu. In that case, do you really have to ask this question here on quora? Can’t you ask your conscience? Have you ever looked into the eyes of a cow (or goat, or chicken)?
We westerners were indoctrinated by Christian tenets (and Muslims by Islamic tenets) that nature including animals is there to serve man who is considered ‘the crown of creation”. The result is a brutal yet unnecessary bloodbath all over the world of billions animals slaughtered daily (alone in US some 90,000 cows daily), often skinned while still alive. It is considered “normal”.
Do we have the moral right to do this? Hindu Dharma requires using one’s intelligence. It is not a fixed belief system, like Christianity and Islam.
Your ancestors discovered that a cow particularly is like a mother, gentle and giving, everything the cow gives is useful, including its urine and dung. Who would kill her? Who would kill any animal unless necessary for whatever reasons?
Humanity would be more human and ecology would also benefit greatly if this massive brutal slaughter were at least reduced if not stopped.