Approaches of growing chicken at poultry plants for food industry

Serological control of transovarial and post-vaccination immunity to Newcastle disease was carried out in Hisex Brown chickens. Day old chickens had group transovarian immunity stress of 20% with a range of titers from 1: 2 to 1:32, with the absence of zero titers. After triple vaccination of day-old chickens in a control group, serological control after 18 days revealed zero titers of immunity to Newcastle disease. Chickens of both experimental groups, not vaccinated at one day of age against Newcastle disease, but received preparations of the "Prodaktiv" line with drinking water, had the same level of transovarial immunity stress to Newcastle disease at the age of 18 days. Serological monitoring at age of 40 days revealed group immunity in all chickens from 80 to 85%, which corresponds to normal values, but in a control group, in contrast to experimental ones, there were zero titers, i.e. there were intact chickens. At the age of 90 days, after the next scheduled complex vaccination, carried out associated with high rates of immunity to Newcastle disease, there was a slight increase in it in all groups, with intact chickens in the control group. Positive dynamics of live weight of experimental chickens was noted, especially in the group that received "Prodaktiv Forte" with drinking water.