1--Government subsidies of corn and soy
(neither of which a cow/sheep/goat/etc is designed to eat) along with other waste
products which the USDA says is lawful--though not necessarily
healthy--to put in feed.
2--Grass fed animals require more room to move and graze and give back to the earth.
3--Grass fed animals require more time to mature and gain weight since they're eating the way Nature intended for them to eat.
cattle are bred to be bigger and produce larger quantities of milk (which
often causes mastitis leading to overuse of antibiotics).
milk is often split into various products using the original cream to
sell to people since "whole milk is bad for you."
6--Pasteurization allows for longer shelf life yet at the cost of destroying all the enzymes necessary to make milk a healthy food.
7--Grass fed animals produce a milk which has more CLA, Vit A, Vit D, and Vit K2 along with all the naturally occurring enzymes and other heat-sensitive nutrition.
In Summary: Healthy Cows Produce Healthy Products which keep People Healthy