I am NOT in favor of factory raised beef however to think that grass fed is healthier than grain fed may be questionable. First of all as prior posters have said these cows are not solely grass fed. However, above and beyond that is this point that not many are familiar with. Grasses and meadows are often sprayed with pesticides and worse to keep them producing. Also keep in mind that many south american countries still use ddt.
I would love to try the gelatin protocol but am fearful of degrading my efforts over last few yrs to refrain from eating anything from animals that have consumed anti biotics. Testing of the hides and bones would not show anti biotis and hormones given to cows as little as few months ago.