Abstract
For the experiment, three groups of 50 broiler chickens each (two experimental and one control) were created from ROSS-308 cross broiler chickens. The experimental and control groups of birds were created according to the principle ofanalogues.Our first group was the control group and received only the main feed, the second experimental group received 2% mineral feed additive opoka to the main diet, and the third experimental group received 3% mineral feed additive opoka added to themain feed.Broiler chickens were fed standard granulated feed. The birds were kept on the floor for 42 days. During the experiment, the chickens of each group were weighed individually. The growth rate was determined by the live weight of the bird at the time of slaughter or by the absolute and average daily growth rates on the 7th, 14th, 21st, 28th, 35th and 42nd days of growth. On the 42nd day, the birds were slaughtered and their blood and meat were examined.The research results will be useful for optimizing the feeding of broiler chickens and increasing their productivity, and can also serve as a basis for further scientific developments in the field of animal husbandry and poultry nutrition