The objectives of this study were to examine the effect of grape pomace on milk yield, milk composition and cell counts in dairy cattle. Danish Red Holstein dairy cows were allocated to either group CON (n=103) or group CAB (n=108) that was supplemented with 4.5 g grape pomace per cow per day. Significant differences in milk yield were not observable, but group CAB did show a tendency towards increased milk yield at the level of 0.4 kg/cow/day (P=0.1). No effects of grape pomace on cell counts were seen. It is concluded that inclusion of small amounts of grape pomace as a feed additive does not increase protein yield when added to a high protein diet to lactating cows.