THIS FROM EATWILD.COM, which is a fantastic source of information on eating natural healthy food. This is confirmation of what we already know through numerous studies.

Grass-fed Beef Clearly Superior, Says New German and Canadian study
Yet another study shows that grass-fed meat is nutritionally superior to feedlot meat. This newest study examined the differences in fat content between four breeds of cattle that were either 1) raised on pasture or 2) given grain and other feedstuff in a feedlot.

As in previous research, the results showed that meat from cattle raised on pasture had much healthier fats. The researchers concluded that grass-fed meat is “clearly superior” and “remarkably beneficial.” They stated that grass-fed meat “should be promoted as an important part of a healthy balanced diet.”