*Fully updated from first edition *Includes a wider range of animals *Covers both farm and companion animalsAmino acid metabolism and nutrition of farm animals continues to be an active area of research. However, since the publication of the first edition, as Amino Acids in Farm Animal Nutrition (1994), there is now a need to take into account advances in the amino acid nutrition of a wider range of animals, including companion animals. In this new edition, the editor has retained chapters imparting strength to the first version, while introducing authors with new ideas and vision, as well as chapters on other animals, such as cats and dogs. The book is thematically structured and includes chapters of an introductory and general nature with applications to a wide range of animal species, perspectives, and included species-related sections, including pigs, poultry, ruminants and other animals.