Poultry especially Japanese quails are susceptible to the environmental threat that induced glucocorticoid hormone secretion. Glucocorticoids stimulate oxidative stress and a decrease in the immune system. The purpose of this research is to study the potential of silkworm extract (Bombyx mori) to overcome oxidative stress and reduced the immune system in quails that were induced with dexamethasone as glucocorticoid. Thirty-two adult quails were used and were given dexamethasone. Those quails were divided into 4 groups, four groups were given 0 mg, 0.16 mg/kg, 0.32 mg/kg, and 0.64 mg/kg of silkworm extract for each quail. The parameters that were observed are total leucocyte count, differential leucocyte count, and heterophil/lymphocyte ratio. The results are not significant compared to the groups that were not given any supplements. This study shows that the administration of silkworm extract is not effective for recovery purposes.Keywords: antioxidant, quail, Bombyx mori, dexamethasone
                        
                        
                        
                        
                            
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