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Iowa State University

Life Sciences

Animal Science

Journal

Publication Year

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Rumensin: A New Feed Additive For Feedlot Cattle, Steven Nissen, Allen Trenkle Jan 1976

Rumensin: A New Feed Additive For Feedlot Cattle, Steven Nissen, Allen Trenkle

Iowa State University Veterinarian

Because feed comprises over 80% of the cost of producing fat cattle, considerable research has been directed towards improving utilization of the energy in feeds by ruminants. Attempts to get more energy from cattle feeds have included grinding, pelleting, steam flaking, feeding ensiled high moisture grains and feeding high concentrate rations.


Recycling Animal Wastes, Ken C. Moellers, R. L. Vetter Jan 1974

Recycling Animal Wastes, Ken C. Moellers, R. L. Vetter

Iowa State University Veterinarian

During a time period when shortages, ecology, and conservation are routinely a concern to government, business, and individuals, there are renewed efforts to make food production more efficient. Recycling of animal wastes involves the refeeding of animal excreta to other or the same species of food producing animals usually a a fraction of the total diet. For centuries animal wastes have been recycled by allowing hogs to follow cattle and chickens to roam the barnyard. Animals will consume portions of their own feces when fed a diet deficient in certain nutrients.