The aim of this study was to investigate the effects of multienzyme (protease, phytase, β-glucanase, xylanase) supplementation on performance of Japanese Quails (Coturnix Coturnix Japonica) which were raised in different stocking densities. A total of 160 eightday- old quails were used. They were placed as 160 and 80 cm²/quail in cages.

The experimental groups were designed as Control (C) group (160 cm²/quail/cage) and High Stocking Density (SD) group (80 cm²/quail/cage) which were fed with basal diet and Enzyme (E) group (80 cm²/quail/cage) that was fed with basal diet supplemented with multienzyme (1 g/kg diet). The body weight of the E group (between 28^th and 42^th days) increased compared to YS groups (P<0.01). The body weight gain and feed intake (8-42^th day) found higher in the E group than YS group (P<0.01). Feed convertion ratio and mortality were found similar between YS and E groups. The result of the present study demonstrated that multienzyme supplementation in dose of 1 g/kg diet might improve the performance of the Japanese Quails reared to high stocking density.