The feeding value of carbohydrates as a major nutrient in pig diets can be evaluated in terms of digestibility. Pig responses to various components of diets are related to the actual amount of material digested, where the loss of nutrients between the two sites of the digestive tract is taken to be digestion and absorption (McDonald et al 1995). Several reports show that the digestibility of starch from the major grains used for livestock feeding is almost complete (96% to 98%) in the small intestine (Bach Knudsen and Hansen 1991). The rest is digested by the microorganisms present in the caecum and the large intestines leading to bacterial growth in the lower gut. Research conducted by Siba et al (1993) suggests that when the digestibility of the diet in the small intestine is high, the amount of nutrients entering the lower gut will be minimal, hence bacterial multiplication will be lower. Moreover, as the small intestine is the main site of nutrient absorption, diets with higher digestibility rates occuring before the large intestine tended to give higher nutrient absorption and reduction in the amount of nutrients available for bacterial fermentation in the hind gut. This lowering of fermentation suggests reduced risk of bacterial scouring that may occur in the lower tract as a result of hind gut fermentation.