The animals were divided in two groups: one to be fed a high-protein diet (HP, beef, protein 21.59%, carbohydrate 0.03%, fat 6.71%; ash 0.35%; fiber 0.31%; water content 71.01%; caloric content 146.87 cal/100 g), and the other to be fed a carbohydrate-rich diet (HC, boiled rice, carbohydrate 34.56%, protein 3.34%, fat 0.45%; ash 0.02%; fiber 0.30%; water content 61.33%; caloric content 155.65 cal/100 g).