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The experimeit was carried out on 1350 Astra В chickens divided into 5 groups. Standard mixture was fed to the control group. In the remaining four groups, the amount of maize meal was decreased and half of the soybean meal replaced by 15/13% of rapeseed meal. The kind and the amount of antibiotic added to the mixtures varied. The mixtures contained 8/6 mg or 12/6 mg of flavomycin per kg or 10/10...
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