in the US, meat that is labeled as "grass fed" is only required to be grass fed during a what amounts to a few months of their life. in fact, they are almost without exception "finished" with grain to fatten them for market for the last few months of their life. you need to ask when buying from a butcher if the meat is grass fed AND grass finished. personally, i wont pay extra for much grass fed meat. i do have access to grass fed and finished meat, so i eat the fattier cuts of that, and otherwise buy meat from a local (wonderful) farm that irritatingly grain feeds. (we live in a salt marsh- theres no shortage of hay around here.) ill eat the lean cuts of the grain fed meat.