This study aimed to improve the quality of feed to increase milk production of dairy cows at smallholder farms in Bogor Regency. Treatment for feed quality improvement consisted of G1: 16% crude protein (CP) concentrate + calcium fatty acid (Ca-FA); G2: 16% CP concentrate + without Ca-FA; G3: 12–14% CP concentrate + Ca-FA; G4: 12–14% CP concentrate + without Ca-FA (as a control), respectively. Experimental feeding was carried out for 3 months. The results showed that feeding of 16% protein concentrate and Ca-FA had a significant effect (P<0.05) on milk production vs control (G1 = 13.76 L, G2 = 10.16 L, G3 = 16.29 L vs G4 = 7.67 L), increased consumption of dry matter, protein, fat, and feed energy, respectively. Ca-FA supplementation had a significant effect (P<0.05) on Ca and P consumption only in cows received G3. Feeding of 16% CP concentrate increased protein intake so that the ration protein content increased to G1 = 14.25%; G2 = 13.98% vs G3 = 12.87%; G4 = 12.37%. In the current study can be concluded that diet improvement through the feeding of 16% CP concentrate and Ca-FA increased milk production by the increased consumption of feed nutrients.