Every poultry farmer keeping large number of birds is concerned about three or four issues while raising their flocks to maturity.
1. The farmer's key objective is to raise their flocks with minimum mortality losses; in other words, to raise birds with high survival rates. Broiler farmers are comfortable if they can keep 96 per cent or more birds alive until they are sold off at 33-37 days of age, while layer farmers accept a survival rate of 90 per cent over a period of 18 -22 months.