This experiment was carried out in the Obonuco Research Center of Agrosavia (2 replication), Pasto (Narino-Colombia). The productive response and metabolic profile of lactating cows were evaluated according to the supply of oat silage (Avena-Sativa-L). Six first calving cows F1 kiwi-cross x Holstein, during the third lactation period, were used; in grazing, in a 3x3 replicated Latin square, silage was supplied in three treatments TTOS: T1=0,T2=0.8 and T3=1,4% according to live weight (LW) of the animal. Each period consisted of 12 days (d), 5 d for rest and 7 d for measurement, milk was measured during the 12 d and the last 3 d were collected in milking milk/animal samples, it was evaluated: milk production liters (L)/day (d) (PL); %protein (P), %fat (G), %total solids (ST) and urea nitrogen in milk (MUN milligrams (mg) / deliciters (dL)). On d 12, blood samples were taken from coccygeal puncture, determining in serum indicators of metabolic profile (Glucose-Cholesterol-BUM-millimol (mmol)/L)). The information was processed with the R-Project software, with variance analysis and mean comparison tests (Tukey<0,05). There was a significant effect on total dry matter intake (P<0,05) being higher for T3 (15,14 kilograms (kg)/DM/d). The milk production variable (PL) was higher (P<0,05) for the TTOS that included silage (T2:10,01;T3:10,5 L/cow/d) vs 9,36 L/cow/d of the animals without supplement. The other productive and metabolic profile variables did not present a statistical differences (P>0,05) between TTOS. It is concluded that supplementation with Sativa oats silage in Kiwi cross x Holstein dairy cows may be a nutritional strategy to increase milk production during pastures shortage in the high Andean tropics of Narino, Colombia.