feed, Foodstuff grown or developed for livestock and poultry to maintain the health of the animals and to increase the quality of such end products as meat, milk, or eggs. Modern feeds are derived from crops grown specifically for research or from by-products of surplus crops or foods produced for human consumption. Feeds are categorized as either concentrates (high in digestibility of nutrients but low in fibre content) or roughages (high in fibre and comparatively low in digestive nutrients). Most diets consist of a combination of feeds.
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