Effectiveness of alternative feed supplements to broiler diets using a necrotis enteritis challenge model

The effects of two alternative feed supplements (enzyme and organic acids) on mortality, growth performance and intestinal lesions of broiler chickens using a NE challenge model were investigated. The effects of these supplements were evaluated against a negative control (no additives) and a positive control (with monensin and Zn-Bacitracin). Birds fed Alternative A (enzyme) had bodyweights and FCR similar to the positive control group and had significantly higher bodyweight and improved FCR compared to the birds fed the negative control diet. There were only small numerical improvements observed compared to the negative control group when Alternatives B or C (organic acids) were added.