Leo M.L. Nollet & Fidel Toldra 
Handbook of Analysis of Edible Animal By-Products 

Considered high-priced delicacies or waste material to be tossed away, the use and value of offal-edible and inedible animal by-products-depend entirely on the culture and country in question. The skin, blood, bones, meat trimmings, fatty tissues, horns, hoofs, feet, skull, and entrails of butchered animals comprise a wide variety of products inclu