Dietary treatments were as follows: positive control (+C) with 668 g salinomycin and 500 g zinc bacitracin per kg of feed; MOLMlow ( ML; 1, 3 and 5 ); MOLMmedium (MM; 3, 9 and 15 g); MOLMhigh (MH; 5, 15 and 25 g)] per kg of feed; and a negative control ( C; without supplementation).