The present invention relates to a nutritional supplement, as well as a feed with this dietary supplement comprising: 1) an oligosaccharide, more specifically and homotrimer, heterotrimer, gay tetramer, and / or hetero-tetramer, selected from the group consisting of a pentose saccharide, a hexose saccharide, glucuronic acid and galacturonic acid； and 2) a medium-chain fatty acids (MCFA), selected from the group consisting of caproic acid (C6), caprylic acid (C8), capric acid (C10) and lauric acid (C12). The invention also relates to the use of the food supplement or feed in order to improve the efficiency of animal production, such as weight gain, feed conversion, nutritional value, health and well-being by the selective elimination of enteropathogens.Dodatak hrani, koji obuhvata- homo-trimer, hetero-trimer, homo-tetramer i/ili hetero-tetramer ugljovodonične komponente, ili njihov oksidovani oblik, ili njihove mešavine, pri čemu je navedena ugljovodonična komponenta izabrana izgrupe koju čine pentozni saharid kojije izabran između riboze, arabinoze, ksiloze ili liksoze, heksozni saharid koji je izabran između aloze, altroze, guloze, idoze, taloze ili manoze, glukuronska i galakturonska kiselina i gde su ugljovodonične komponente povezane a i/ili P vezama； i- masnu kiselinu srednjeg lanca (MCFA) ili njenu so ili amid, estar ili glicerid i/ili njihove mešavine, pri čemu je pomenuta MCFA odabrana iz grupe koju čine kapronska kiselina (C6), kaprilna kiselina (C8), kaprinska kiselina (C10) i laurinska kiselina (C12).Prijava sadrži još 12 patentnih zahteva.
