Here is an article from edible SOUTH SHORE magazine with information of grass fed vs feed lot beef and a nice write up about the farm 'my cow' is currently grazing at. The article goes as far as saying eating beef can be good for you, as a good a source as fish for Omega-3's , but better due to lack of mercury. To read this informative write up click on the title above.
Edit: I wanted to add this in too, good for me to remind myself why I pay so much money for the stuff....."An even bigger threat is the change that occurs to a cow’s rumen when it eats this modern and unnatural diet of grains, in lieu of grass. Cows’ guts naturally have a neutral pH. Our acidic one, until recently, had been able to kill off any E. coli that might find its way into our food. Today, however, with grain being the food du jour in feedlots, cows’ rumens are now acidic and certain strains of E. coli have grown resistant to an acidic bath, which means we have lost our natural defense against this killer. "
"Pollan says there is a simple solution to the problem. “Jim Russell, a USDA microbiologist on the faculty at Cornell, has found that switching a cow’s diet from corn to grass or hay for a few days prior to slaughter reduces the population of E. coli 0157:H7 in the animal’s gut by as much as 80 percent. But such a solution (grass?!) is considered wildly impractical by the cattle industry and (therefore) by the USDA. Their preferred solution for dealing with bacterial contamination is irradiation—essentially, to try to sterilize the manure getting into the meat.” Instead of overhauling the whole meat industry with a simple and natural solution of grass feeding, the USDA prefers to put more band-aids on a broken system." From edible CAPE COD.