Grass fed or pasture-fed cattle, grass and other forage compose most all or at least the great majority of the grass fed diet. The debate is whether cattle should be raised on diets primarily composed of pasture (grass) or a concentrated diet of grain, soy and other supplements. The issue is often complicated by the political interests and confusion between labels such as "free range", "organic", or "natural". Cattle raised on a primarily forage diet are termed grass-fed or pasture-raised; for example meat or milk may be called grass-fed beef or pasture-raised dairy. However, the term "pasture-raised" can lead to confusion with the term "free range", which does not describe exactly what the animals eat. Another term is "grass-finished" which may mean either cattle fed exclusively, including finishing, on grass alone or cattle that have been fed grain up until finishing - at which time they're switched to grass