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The topic of byproduct feeds can be a very long list from well known oil seed meals to corn byproducts from the distilling industry to potato waste to orange peels. In addition, people feed chocolate candy, Keebler’s cookies and the list can go on and on. This paper will focus primarily on byproducts from the alcohol and oil industry. Even though byproducts from the oil industry, such as cottonseed meal and soybean meal, have been available for many years, the tremendous growth into the bio-fuels industry has increased the quantity of byproducts available for cattle feed. Historically, we have looked at the higher protein byproducts as a protein supplement for cattle consuming low quality roughages; however, today in many cases, we are looking at the byproducts from the alcohol industry as both a protein and energy source. In some cases, it may be more economical to overfeed protein to meet the cattle energy needs.