Three diets of varying rumen degradable protein: undegradable protein (RDP:UDP) ratios, namely, A, 72:28; B, 55:45 and C, 55:45, (the latter having 20% less CP than either Diets A or B), were assessed using 18 crossbred lactating goats (Alpine Beetal). The results showed that DMI was unaffected by the change in proportion of RDP:UDP in diets (P > 0.05). Digestibility coefficients of nutrients were not affected by diet except CP, which was higher (P < 0.05) in Diet B than in C. Positive N balance was found in each group. Milk, FCM yield and composition were similar between dietary treatments. Nitrogen intake per kilogram of DOM was lower (P < 0.01) in diet C than in Diets A or B, which were similar. CP intake per kilogram of milk and FCM yield were unaffected by diet, and the same applied to protein and GE efficiency for milk production. It was concluded that a change in proportion of dietary RDP:UDP from 72.28 to 55:45 did not influence DMI, nutrient digestibility, or the composition of milk. However, a modified ratio of RDP:UDP (55:45) with 20% less CP was able to sustain similar milk production as the other diets.