EN
The level of adrenaline, noradrenaline and corticosterone in blood plasma of adult chickens immobilized by fastening of legs and wings was examined after 1, 3, 6, 12 and 24 h since the beginning of immobilization. The level of adrenaline and corticosterone increased significantly after 3 and 6 h since the beginning of immobilization and then steadily decreased. The concentration of noradrenaline significantly lowered during the whole period of immobilization. It was also noted a slight increase of metabolic activity of blood neutrophils measured in the NBT. These results point to decrease of the suprarenal glands activity (adaptation) just after a few hours of stress.