The first week: the broiler brooding period the most critical, the temperature stays up late (the first 3 days remain at 33 ~ 35 °C, after 4 days 30 ~ 32 °C), the temperature deviation, the chicks are vulnerable to cold death, poor absorption of yolk, diarrhea, resulting in late The chicks grow unevenly. 12 to 18 days: Complete absorption of yolk of broilers is completed and resistance to disease is generated by inoculation. At the same time, the vaccine stimulates the respiratory tract to induce slow call, pericardium, and airbag inflammation, most of which are caused by the respiratory tract. 28 to 35 days: high-grade stage of viral disease, this stage is the key to success or failure. Management requirements: 1 Get up at 5 o'clock in the morning and observe the flock and feeding conditions. The diseased chicken stays away from the corridors. You will be alone. Observe the chicken excrement on both sides of the shed. Comprehensive analysis or professional and technical personnel are required. In the afternoon, the feed intake of the flock was observed (feeding was completed at about 4 o'clock in the afternoon today at 4 o'clock yesterday). If the time was delayed, the feed intake decreased. 3 In the evening, the flock rested and listened to the sounds of the flock (screaming, coughing, etc.). The unusual sound indicated that the flock was infected.
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