User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-76.69.4.124-20111018082902

I think monsters have extremely inefficient digestive systems. They frequently have some kidney stones / gallstones which are made of hard enough minerals to be used in the construction of weapons and armor (wyvern stones). Their dung is great fertilizer, so it doesn't seem like nutrients are well absorbed. The fact that they're gigantic and extremely dangerous is probably because they need to eat high volumes in order to make up for the poor nutrient absorption.