Disclosed herein is a feed by means of which milk production of cows and milk fat and protein content of said milk can be increased. Preferably also the trans fatty acid content of milk fat is lowered. The feed according to the invention contains, in addition to conventional feed ingredients and conventional additives and other auxiliary agents, inside and on the surface of feed raw material particles a fatty acid mixture in which the content of saturated fatty acids is more than 90 %, and wherein the fatty acid mixture is present in an amount of 1-10% by weight in the feed. The invention is also directed to a process for preparing said feed as well as to a method for changing milk fatty acid composition, for increasing milk production and for increasing milk fat content and increasing milk protein content.