Dynamics of erythrocyte indices in broiler laying hens against the background of ergotropic drugs

The article discusses the issue of using ergotropic drugs in chickens of the COBB-500 cross. The object of the study was laying hens, the subject was blood. Blood tests were performed before taking the drugs, after a five-day drinking of the drugs, and two weeks after the last day of using the drugs. The concentration of hemoglobin in the blood was determined by the hemiglobin cyanide method on a semi-automatic biochemical analyzer BioChem SA, hematocrit - on a hematocrit centrifuge SM-70, red blood cell counting - in a Goryaev chamber with Fried and Lukacheva reagent (modified by I.A. Bolotnikov). The calculation of integral blood indices MCV, MCH and MCHC was performed according to generally accepted formulas. The studied drugs “Vitol SN”, “Anti-stress V-K-choline”, “Intromin Oral”, used in doses of 0.5 ml/l, 0.25 ml/l and 0.5 ml/l, respectively, had a positive effect on the concentration of red blood cells and hemoglobin, as well as on the rheological properties of blood. A prolonged effect was observed with the use of the drugs “Antistress V-K-choline” and “Intromin Oral”.