The story begins in the meat processing industry, where every scrap and byproduct is a potential moneymaker. Meat and bone meal, one such byproduct, is made by grinding up heads, tails, bones, and other parts of cattle that are not sold as beef. About the only large-scale use for this product is as a source of protein in livestock feed and pet food. A number of other organic residuals have established markets and provide evidence to the feasibility of manure markets. Meat byproduct markets, such as hot dogs, lunch meat, ethnic markets and hides, make the difference between profits and loss for the meat industry. Byproduct feed ingredients command high dollar values for residuals that once had little or no value

2.edible variety meats=these are generally internal organs such as hearts,tongues,livers or external parts such as feet ears and tails these are commonlly called "Specialty meats"

3.Inedible variety meats=spleens,lungs,condemend livers are the more common items in this category.typicaly the large slaughter houses form these separately into large blocks and are sold to pet food manufactures.there is also a possibility of cooking mixing and grinding with other industrial by-byproducts for animal feed.

4.hides&skins leather can be made from pig skins.Beef hides represents two-thirds the value of all byproducts from cattle

5.pharmaceutical products=pepsin is made from hog stomach lining and fetal calf serum from beef plants.even pork heart valves are still used in surcery

6.fats and other miscellaneous byproducts=edible pork fat is boxed and frozen and shipped to mexico where it is used to make sausage combinations.Blood is dried and converted into animal feed called blood meal.meat scraps,inedible fat,and ground up bones are mixed together to produce what is known in the industry as meat & bone meal.these are also animal feed components

packing house byproducts,A.Severin Johnson,Iowa State University 2-03

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