Animals were fed on 60% concentrate feed mixture (CFM), 20% rice straw and 20% berseem clover (control group), control ration + chemical mixture (sodium acetate 100 g/head/day + sodium succinate 3.5 g/head/day)(T1); control ration + chemical mixture + dry yeast 10 g/head/day (T2) and control ration + chemical mixture + chamomile flower 10 g/head/day (T3).