In the investigation, 30 white leghorn cicks which were at the same age, similar body weight and healthy were used. The animals were divided into 3 groups as Control, Group ST (Stress) and Group AA (Ascorbic acid). Food and water were given ad libitum. Each group was placed into different compartment. It was 40 dm² foreach bird off toor area for the control animals. But, in the experimental groups, the floor area was 10 dm² for each bird. During the experiment, ascorbic acid (vitamin C) was added to food of the animals in Grofp AA. (150 mg/kg) The increased levels of plasma corticosterone is experimental groups indicated to occur stress. In the cocks of Control Group; mean blood serum total thyroxine (TT₄), total triiodothyronine ((TT₃). glucose, total cholesterol, total protein levels and plasma corticosterone levels were found to be 2.76 pg/dl, 0.71 ng/dl, 185,63 mg/dl, 115.35 mg/dl, 4.17 gr/dl and 0.96 ng/ ml respectively. The levels of serum TT₃ (0.45ng/m! ) and total cholesterol <106,62mg/dl) in the animals of Group ST decreased. However, plasma corticosterone (1,57ng/ml) and serum glucose levels (207.32mg/dl) were increased. Mean serum TT₃, glucose, total cholesterol and plasma corticosterone levels in the animals those were given ascorbic acid were determined to be 0.53ng/ml, 191.64mg/dl, 111,54mg/dl and 1.02ng/ml respectively. The levels of serum TT₄ and tota! protein amongst the groups were not significantly differences. Based on results, it was concluded that some blood metabolites were significantly influenced by stress.