New Delhi, Oct. 29 -- On a Sunday evening in October, amid the usual visitors and tourists at the Deer Park in Hauz Khas, a small gathering held up curious placards - AI images of a cow and calf crying, images of slaughter houses, a glass filled with milk with blood spilling from it.

The group - around 10-15 - were dressed in black T-shirts that read, "Milk is not vegetarian."

While some visitors frowned at the placards, a few stopped and struck up conversations with the volunteers.

They are from the Animal, Climate and Health Save India. The group's activists and volunteers, from across Delhi, conduct outreach programmes as part of a national drive to tell people about why they should stop consuming dairy products.

"We do this to exp...