Just like other factories, animal factories are constantly searching for ways to shave their costs. To save money, they’ve redefined what constitutes animal feed, with little consideration of what is best for the animals or for human health. As a result, many of the ingredients used in feed these days are not the kind of food the animals are designed by nature to eat.
Just take a look at what’s being fed to the animals you eat.
http://animalliberationfront.com/Practical/FactoryFarm/WhatFarmAnimalsEat.htm