[OfSanguineFire]

Even if hundreds of millions of people in India do not eat meat, ghee and milk – both animal products – are a key part of the Indian diet. Moreover, quite a lot of those Indians eschewing meat will still eat eggs, such that restaurants have to use the term "pure vegetarian" to disambiguate.

[r00fus]

Even a large amount of lacto-ovo-vegetarian vs. omnivore will reduce the amount of farm animals (and feed/land use) by a vast amount.

offtopic: I disagree with the "subspecies" comment from GP - it was a bit inflammatory.