Portuguese traditional sausages (PTS), like other sausages, consist mainly of pork meat (with the exception of alheira and far- inheira) and fat, as main ingredients. For the large majority of each of the indicated products, ingredients and additives are regulated under the Portuguese standard system. Different autochthonous pig breeds, fed differently, cause inevitable differences of taste in sausages, which are produced in different regions. For example, in Tras-os-Montes “Bisaro” breed (or crosses) is the predominant meat source, while in Alentejo, “Porco Alentejano”,a rustic and fatty pig similar to the Spanish Iberian pig, is the main breed for traditional sausage production. Also, commercial pig breeds such as large white, landrace, Pietrain, and particularly Duroc and their crosses with local breeds are frequently used.