Pigs eat grass if they are very hungry, but they can't use it as a regular source of food.
The commandment 'Thou shalt not kill' does not say it's O.K. to kill some people and not others.
Food, like sex, is one of the principal kinds of human activity that engage people when they wonder about how to account for different kinds of human behaviour.
Unfortunately, the food industry has not yet faced this situation and begun taking measures to avoid exploiting our weakness for not knowing when we have had enough.
If I can bring some light to bear on problems like that, I feel that people will be enlightened not only on the question but also on a way of approaching such questions.
Pigs prefer to wallow in clean mud, but if nothing else is available, they will frequently wallow in their own urine, giving rise to the notion that they are dirty animals.
Like most North Americans, I'd been raised on the notion that milk is the first food, and everybody must like it because it's so good and so important for growing up and for being healthy.
I don't know of any cases where as a result of religious precepts a population have found themselves enjoying less food than they would have if they didn't follow this particular religion.
The answer has to be sought in the material conditions of the production and utilization of cattle in India compared with the production and utilization of cattle in other parts of the world.
However, further research has shown that it is the normal condition for humans and for most other mammals. It seems pretty clear why this is the case for most mammals and for most human beings.