In the fall, chickens often experience a decrease in appetite, reduced digestive efficiency, weaker physical condition, slower growth, lighter weight, and lower egg production in laying hens. As a result, it becomes crucial to focus on daily management and disease prevention. With the arrival of late autumn, temperatures drop, and proper insulation of the chicken house becomes essential. **Management Measures** 1. Observe the flock’s behavior, appetite, and feces during morning and evening feeding. Chickens showing signs of fatigue, poor appetite, or abnormal droppings should be isolated, examined, and treated promptly. 2. Add a variety of vitamins, trace elements, and amino acids to the feed. Provide vitamin C and Huoxiang Zhengqi powder in drinking water to help reduce stress. Ensure enough feeding troughs and waterers are available so that every chicken has access to food and water. 3. Minimize the impact of temperature fluctuations by delaying the morning stocking time by 30 minutes to an hour compared to summer. Maintain a stable microclimate inside the chicken house to reduce the temperature difference between day and night. If daytime temperatures are too high, move the chickens to shaded areas; if nighttime is cold, allow them to return to the coop. 4. Control stocking density based on the age and size of the chickens, grouping them appropriately for optimal health and growth. 5. Keep the broiler house dry and well-ventilated to ensure fresh air and no unpleasant odors. Replace litter regularly to reduce ammonia levels and improve overall hygiene. 6. Implement the “all-in, all-out” system. After selling the chickens, clean and disinfect the entire house and equipment thoroughly for at least two weeks before introducing new flocks. **Bacterial Diarrhea** This condition often occurs due to improper intestinal regulation caused by fluctuating temperatures, leading to the proliferation of harmful bacteria. Affected chickens may appear healthy but grow slowly, with pale combs and white or mucus-filled droppings. Feces may contain undigested feed and appear yellowish. Some chickens may show signs of depression, head drooping, tremors, and frequent movement. The incidence rate is typically around 1%. **Prevention and Treatment:** - Isolate sick birds, remove litter, and disinfect thoroughly. - Maintain warmth and good ventilation. - Use microecological agents to restore gut health. - Administer antibiotics such as penicillin, chlortetracycline, norfloxacin, tetracycline, oxytetracycline, and streptomycin via water, feed, or injection. - Vaccinate if there is an outbreak in the area. **Chicken Pox (Fowlpox)** Caused by the fowlpox virus, this disease reduces egg production in laying hens. Symptoms include skin nodules on the comb, wattles, and eyelids, or a yellowish pseudomembrane in the mouth and throat. There is usually no death, but affected chickens may have breathing difficulties. **Prevention:** - Vaccinate chickens regularly. - Keep coops clean, dry, and well-ventilated. - Prevent mosquitoes and other vectors. - Treat secondary infections with antibiotics, but no specific treatment is usually required. **Chicken Leukocyte Protozoa** This disease is caused by protozoa invading blood and internal organs. Symptoms include lethargy, loss of appetite, green and bloody feces, anemia, and sudden death. Necropsy reveals pale tissues, hemorrhages, and nodules in the liver and kidneys. **Control Measures:** - Spray insecticides like malathion and deltamethrin to control vectors. - Add pyrimethamine or sulfaquinoline to the feed. - Use drugs such as compound sulfamethoxazole, clopidol, and Maduramycin. - Supplement with VK3, hemostatic agents, and B12 to aid clotting. **Infectious Rhinitis** Characterized by nasal inflammation, sneezing, facial swelling, and respiratory issues. Chickens may suffer from conjunctivitis, swollen eyelids, and difficulty breathing. **Prevention and Treatment:** - Vaccinate the flock. - Improve ventilation and hygiene in the chicken house. - Use sulfa drugs or herbal remedies like Angelica, Astragalus, and licorice. - Feed the mixture for 9 days, using about 42 grams per chicken daily.

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