I was in the butchers yesterday and they were fresh out of musk ox. However they did have plenty of beef, pork lamb and chicken. Now it's been a long time since I sat in lectures working out feed ratios so I'm a bit rusty but from what I remember cattle are mostly fed on grass or it's derivatives( including cereals) . Pig feed is mostly cereals and soya and sheep graze upland areas and are supplemented with hay. I don't know much more about chickens than musk ox but my guess would be that they eat grain and some sort of concentrate that is derived from grain. Correct me if I'm wrong but it seems that with most of the commonly consumed meat (in the uk at least) although the little fellows can live on non productive land, they are fed from land that could grow crops to be fed to people. Producing meat on land that has no other uses has got to be a good thing and I for one would applaud it but some of the other ethical issues also come in to play. Here in Wales for instance the natural habitat of the upland oak forest is devistated by over grazing by sheep. The oaks are there but the under storey has gone. I am not trying to support vegetarianism particularly (I,m not vegetarian myself) I would just like to know the facts.