Fed Brahman or Charolais-Brahman crossbred yearling beef cattle with concentrates containing 50% cassava chip,50% cassava pulp or 50% cassava peel at a rate of 1.5% body weight together with ad libitum rice straw and found no significant difference body weight gain between the treatment groups although beef cattle on cassava peel consumed less DM than other cattle. [9] Replaced cassava chip by cassava pulp at a rate of 0, 50 and 100% in the concentrates and fed crossbred Holstein Friesian (>87.5% Holstein Friesian) heifers 2% body weight of concentrate plus ad libitum rice straw. The results showed that rice straw and total DM intake, eating behavior, fiber digestibility, rumen fermentation end-products, blood metabolite and body weight gain were similar in all treatments