intestinal
morphology and immune response of broilers. A total of 240 Ross 308 male broilers were
randomly (completely randomized design) allotted to five treatments, with four replicates
per treatment (12 chickens per pen). Birds were offered either a maize-soybean meal basal
diet (control, CON) or the basal diet supplemented with 200 mg/kg virginiamycin (VM);
200 mg/kg peppermint oil (PO1); 400 mg/kg peppermint oil (PO2); or 500 mg/kg Fructomix
(FM). After 6 weeks, daily live weight gain and feed intake were higher (P