Materials and methods: Ninety-six crossbred pigs 17 to 20 days old were randomly assigned to six experimental diets. A nonmedicated basal diet was supplemented with carbadox (55.12 g per tonne), copper sulfate (192.40 g copper per tonne), zinc oxide (2712.68 g zinc per tonne), or the probiotic feed additive BioPlus2B (Chr Hansen Inc, Milwaukee, Wisconsin; 1.1 × 106 or 1.3 × 106 spores per gram ...

Application of most antibiotic growth promoters as feed additives has been banned in a lot of countries due to cross-resistance against pathogens and residues in tissues. Therefore, scientists are searching for alternatives to antibiotics nowadays. Medicinal plant extracts are one of the alternatives that have anti-microbial and growth promoting effect on poultry. In this paper, the benefits of...

THE public and the medical profession generally regard the "antibiotics", by which they mean the synthetic anti-infectives as well as those produced by microorganisms, as the most beneficial group of drugs introduced in the last 35 years. Some concern has been expressed from time to time about the ways they are used, especially in hospital and as an additive to animal feed stuffs. But on the wh...

The article presents the results of feeding broiler chickens with different doses feed additive "M-feed". It was found out that use optimal dosage "M-feed" in chickens' diets contributed to an increase absolute gain by 7.7%, average daily 7.6%, and gutted carcass weight 12.9%, contrast control group.