For layer hens, the cold flu mostly occurs in the alternating seasons of winter and spring and autumn and winter; wind-heat colds occur mostly in the summer and in the summer and autumn. The specific differences are as follows:
1. Mental status: The cold is cold and chilly, and the body feels sore, so the chickens are in a state of depression. The symptoms of wind-heat fever do not appear at the beginning.
2. The chills and colds due to cold injury, so the early chickens are not greedy; and the wind and heat flu due to injury, so the initial increase in the amount of drinking water.
3. Body temperature: cold cold with head fever, fever mainly under the wings, cold legs; hot and cold are mainly chicken fever.
4. Cold cold chickens have a low mortality rate, and egg production is easy to recover; wind and heat colds are the opposite.
5. In the early days of the cold, despite the fact that chickens have a fever, there is no change in the excrement. It is easy to see yellow and green stools in the late stage. Yellow and green excrement will appear in the early stage of the fever and cold.
6. During the early days and early evening when the cold was cold, the mental state of the chickens was particularly weak. At noon and morning when the temperature rose, the mental state was better. It even gave people the impression of "recovery." This illusion.
7. Cold Colds The chickens in the early stages of the respiration experience a very slight sound, many of them have clear nose, and even more obvious; windy and hot colds have obvious respiratory symptoms, but runny nose chickens have little or no early stage.
8. The cold intake of chickens in the first two to three days of the cold-cold cold was slow or even inconspicuous; the intake of chickens at the early stage of the onset of wind-heat fever fell rapidly or even halved.
9. Cold and hot winds The eggshell color will be lighter in the early stage of the cold, but the cold and cold are more obvious; the wind and heat cold will reduce the egg production rate quickly.
10. Cold colds are mostly caused by improper insulation, sudden drop in temperature, or sudden cold weather; wind-heat colds also occur when the aforementioned environment changes little.
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