Lohmann Hatchery Guide

36 LOHMANN TIERZUCHT › MANAGEMENT GUIDE 36 › › Improper incubation temperature: follow recommended incubation, not too warm and not too cold. › › Improper eggs turning: control turn- ing functions of eggs and relative correct angles. › › Improper ventilation: increase ventila- tion and control carbon dioxide (CO2) › › Improper incubation temperature: follow recommended incubation, not too warm and not too cold. › › Improper eggs turning: control turn- ing function of eggs and relative correct angle. › › Improper ventilation: increase ventila- tion and control carbon dioxide (CO2) value, if location is high above sea level then add oxygen. value, if location is high above sea level then add oxygen. › › Inherited low hatchability, poultry disease: check genetic potential; test for disease in flocks; make use of medi- cal care; test health, investigate factors under veterinarian action. › › Improper hatcher conditions: verify the hatcher setting programme and re- spect the steps. › › Inherited low hatchability, poultry disease: check genetic potential; test for disease in flocks; make use of medi- cal care; check health; investigate fac- tors under veterinarian action. › › Improper humidity value: too low or too high humidity. DEAD AT TRANSFER TIME, 17 – 18.5 DAYS DEAD AT HATCHER TIME, 19 – 21 DAYS › › Improper humidity value: too low or too high humidity. › › Transfer anomaly: control transfer at the right time and in a warm room, warm basket or warm hatcher machine which is switched on; avoid thermic shock and inopportune shower of eggs. › › Disinfection in hatcher after trans- fer: some hatcheries have use of fumi- gation in processes or choose special disinfection immediately after transfer. Always control product and relative dosage. › › Improper breeder nutrition: feed breeders a diet with balanced nutrient levels. › › Transfer anomaly: control transfer at the right time and in a warm room, a warm basket or a warm hatcher ma- chine which is switched on; avoid ther- mic shock and inopportune shower of eggs. › › Disinfections during hatcher time: some hatcheries use special methods of disinfection during the hatcher process time. Always control product and rela- tive dosage. › › Improper breeder nutrition: feed breeders a diet with balanced nutrient levels. If this is a problem in this period, it is easy to note that some chicks have a big oedema in the back of the head. › › Wrong hatcher step: check effective embryological time and synchronise with hatcher time and programme. NECROPSY AND BREAKOUTS ANALYSIS