The study involved 120 young quails divided into 3 equal groups. The control birds were fed a standard diet for 38 days. In group II, the standard diet was supplemented with 6 g/kg of oligosaccharides isolated from seeds of narrow-leaved lupin (Lupinus angustifolius) cv. Emir, in group III with flavomycin (4 mg/kg). Neither the oligosaccharides nor the antibiotic supplementation significantly affected the feed intake, feed conversion ratio or final body weight. The carcass yield was similar in all tested groups. Females fed the diet supplemented with oligosaccharides had significantly (P≤0.05) higher serum lysozyme levels in the blood serum (25.6 µg/ml) and pulmonary tissues (385 µg/ml). It may be concluded that neither the oligosaccharides nor antibiotic supplementation of the diet affected the performance of young quails significantly, but oligosaccharides had a favourable effect on the immune system and health of quails.