Diets fed in years 1 and 2 contained about 400g/kg of DM as rice straw and, in spite of a sharp increase in the nutritional quality of the supplemental feeds from years 1 to 2, the BW gain of about 0.62kg/d would not likely be judged sufficient for replacement dairy cattle.However,withappropriatesupplementation,achievedinyear3,alikelytobejudged acceptable BW gain of 1.18kg/d can be achieved, but with only about 250g/kg of DM as rice straw in the diet.