Prepartum DM intake tended to be higher with increasing RPFA supplementation. Postpartum intake of DM and NEincreased linearly (P < 0.05) with increasing RPFA supplementation (Table 2). Actual milk yields increased linearly (P = 0.023),whereas milk fat content tended to be higher (P = 0.067) and milk protein content increased linearly (P = 0.006) with increas-ing RPFA supplementation. Consequently, FCM yields and milk protein production increased linearly (P < 0.05) and milk fatproduction tended to be higher (P = 0.078) with increasing RPFA supplementation. As expected, DM intake continuouslyclimbed throughout the experimental period (Fig. 1). An interaction between RPFA and lactation week was noticed for thedata of intake and milk production. Intake of DM was higher (P < 0.05) for MRPFA and HRPFA than for control except at week1, 2, 5, and 10. Intakes of NE, production of actual milk, 4% FCM and milk protein followed a similar trend with the DMintake. However, no interaction between treatment and time was found for milk fat production, milk lactose production,milk composition and feed efficiency.