Proteomics may be defined as the large-scale study of the proteome, i.e. a set of proteins being expressed in a certain fluid, tissue, organ or organism. Although still of limited and restricted use in most areas of farm animal and veterinary research, proteomics potential is unequivocal holding a significant promise in applications such as vaccine and drug development, animal product quality, physiology or toxicology. Nevertheless, proteomics use has been growing steadily during the last 2-3 years and, as time goes by; proteomics-based studies are more and more common, not just to scientists but to the general public, unravelling their full potential.This book reflects the will of a group of scientists that merge innovation with excellence of research and to whom the dissemination of knowledge and innovation through cooperation is a key essential point. It will be of interest to scientists at the early stages of their careers as well as to researchers well established in the field and to whom proteomics may be the necessary next step towards more in-depth research activities.