well my explanation of being a Vegie. is that.......Man is of course on the top of food chain........God has given man "intelligence" to think what is gud & what is bad.
in scientific terms, more elements of earth u distroy...more likely is that u will face the bad consequneces (if u believe in Karma theory). Plants have 2 elements, birds have 3 elements & animals have 4 elements.
for eg, the law of justice states that..more severe the crime..more punishement would be given..
How would u like that ur head is being cut by a bucher's kife or ur skin is just pulled out from ur muscles..ALIVE!!!
regarding food chain...well lions & tigers, etc r there to eat them coz they dont have intelligence.
i dont know if that makes sense to any of u...but does to me.