Base on the results from the field survey it indated that the average daily gain (ADG) of the  indigenous pigs raised by the farmers in the northern part of Laos was not more than 100 g/day, the average litter size was 5-6 piglets/litter, and the mortality of piglets was 30-50%. The local feeding ingredients used by farmers were rice bran, maize, cassava root and some supplementary vegetables of which could not use all year round. Our hypothesis of the study was: the feed that farmers used to feed their animals had not enough in both quantity and quality and including poor management, therefore the productivity of their pig production was low. In order to test our hypothesis, the livestock research team with URDP support has conducted a study by conducting the experimental trial with farmers participation. The experimental animals (pigs) were divided into groups with two treatments: 1.) Animal group one were fed with local feed formulation (as farmers used to feed) (T0 as control) and 2.) lcal feed formulation with supplement with Stylo forage 10% (T1). One hundred fifty five of local pig with 50 of male, 2-3 month of age and weighing on average 10-15 kg ,were used in CRBD (Complet Randomise Block Design) arrangement to study the effect of graded levels 10% of fresh stylo legume supplementation in diet. The study combined two treatments : Treatments one: traditional feed 100%; Treatments two: traditional feed 90% + stylo fresh 10% and implemented in 06 villages (blocks), 31 houheholds (replications) and 05 pigs per household. There was no significant difference on daily live weight gain P<0.05 (109 g/h/d, 114 g/h/d) but there was significant difference on mortalility rate of winning pigs. The experiment results show that supplementation 10% of fresh stylo legume for local pig could have an additional daily weigh 15 to 40 g/h/d only

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