Abstract
The study aims to investigate the effect of composite feed additive, created from natural mineral rocks of the West Kazakhstan region, on haematological parameters in chickens. Determination of cytological and biochemical indices was carried out using automatic analysers Chem Well 2910 and Mindray BC-2800 Vet. As a result of the application of mineral premix in animals of the experimental group, an increase in the number of erythrocytes by 4.04% (P<0.01) and haemoglobin by 7.42% (P<0.01) was observed. The greatest positive changes were observed in the indices of protein and mineral metabolism. The local mineral premix, with its bioactive therapeutic properties, increased carcass weight by 292±10.3 g, enabling cost-effective poultry rearing. Its simple preparation makes it suitable for widespread use in broiler breeding across industrial enterprises.