Grass-fed
Describes cattle raised wholly or mostly on grazed grass and forage rather than grain.
Also: pasture-raised, grass-finished
Grass-fed cattle eat pasture and conserved forage such as hay and silage for most or all of their lives, rather than being finished on grain in a feedlot. The term is used in labelling, and its meaning varies by country and scheme: some require grass and forage only for the whole of life, others allow some grain. Most cattle in New Zealand, Ireland, Uruguay and much of Africa and South Asia live largely on grass and crop residues. Grass-fed beef is usually leaner, with yellower fat from the carotene in grass, and the animals take longer to reach market weight.