This article presents experimental data on the detection of age-related changes in the blood digestive enzyme blood amylase in partridges (Alectoris chukar). The purpose of the work is to determine the kinetics of changes in the blood digestive enzyme amylase in partridges in ontogenesis with the complex use of vitamins and an anti-stress drug. Experimental studies revealed the dynamics of changes in the digestive enzyme amylase in the blood plasma of partridge chicks from the moment of hatching and up to 2 months of age, with the complex use of vitamins (A-20000 IU, D3 -1250 IU, E-50 mg), as well as the anti-stress preparation of succinic acid) at the rate of 0.03 g per 1 kg of mass. Determination of the activity of the blood digestive enzyme amylase in partridges was carried out spectrophotometrically according to the method of Karavea, on a Specol 1500 spectrophotometer (Analitik Jena), at a wavelength of 690 nm. It was revealed that the activity of the blood digestive enzyme amylase in 1-day-old control partridges significantly exceeds the activity of this enzyme in 7, 13, 22, 31 and 60-day partridges by 1.6, 1.9, 2.2,1.9, 1.8 times, respectively. The activity of the blood digestive enzyme amylase in 1-day experimental groups of partridges significantly exceeds the activity of this enzyme in 7, 13, 22, 31 and 60-day experimental groups of partridges by 1.4, 2.3, 2.6, 1.8, 1.9 times, respectively.