The principle of brooding to temperature is: high in early period and low in late period; weak and high in young and strong in young; small in high and large in group; high in rainy days, low in sunny days, high in night and low in daytime. Changes in temperature should be gradually and steadily carried out in accordance with the growth of age and temperature, and must not change at any time. The higher the starting temperature, the lower the incubation temperature than the hatching, or the chicks do not adapt, the group does not want to fight the heap, not to eat, not normal growth. Usually 1 to 2 days old brooding temperature (back height or 5 cm height on the web) is 34 ~ 35 °C, temperature 27 ~ 29 °C. Afterwards, the temperature is lowered by 3°C every 7 days, and the temperature is reduced to about 21°C by the 28th day. This temperature is maintained thereafter.
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