In summer, it is very suitable for the survival and spread of viruses and bacteria. If the farming conditions are poor, the management level is low, the chickens are often in a harsh environment, the disease resistance will be reduced, and they are susceptible to three syndromes.
Egg drop syndrome
Flocks that occur mostly during peak egg production or rising eggs are common in natural conditions such as sudden temperature rise and sudden drop. The egg production of chickens has dropped by about 20%, and some even exceed 40%. The symptoms are similar to those of respiratory syndrome, and the cause is related to viral infection, improper feeding or feeding, stress factors, and drug side effects.
Control measures: In addition to immunization with egg-dropping syndrome vaccine and strengthening comprehensive health care, other treatments similar to respiratory syndrome are similar.
Broiler ascites syndrome
More common in chickens aged 4-5 weeks, the incidence rate is generally 3% -5%, which is one of the most serious diseases of broilers in late spring and early summer. The sick chicken’s abdomen is swollen, the head and face are purple, breathing is difficult, and it gradually declines and dies. The disease is caused by multiple diseases, including chronic hypoxia in the house, high ammonia concentration, feeding high-energy feed, excessive growth rate, nutritional factors, poisoning (such as salt, drugs) and genetic factors. Pathogenic factors.
Control measures: 1. Improve the breeding environment. Pay attention to the hygiene of the house and the chicken battery cages, while maximizing ventilation. 2. reasonable mix feed. The energy of the feed should not be too high, the salt should not be excessive, the calcium and phosphorus should be balanced, and the vitamin and sodium bicarbonate (0.2%) should be properly added. 3. early limit feeding. Broilers can be properly restricted for 2-3 weeks and fed to 90% of normal diets. 4. reduce stress response and prevent poisoning. In particular, it is necessary to prevent the administration of sulfonamides that are highly toxic to the kidneys and liver; aminoglycosides, quinolones and other antibiotics cannot be used too much; 5 Ascites syndrome often secondary to E. coli or chronic respiratory disease, you can choose to take sensitive drugs to prevent secondary infections.
Fatty liver syndrome
The disease is a nutritional disorder caused by a disorder of fat metabolism in chickens. The sick chicken cockscomb and the meat cockroaches are pale and anaemic, grayish white and thin faeces, the head and neck stretched forward or the back is bent, the ground is smashed, and finally lose weight.
Control measures: 1. Control the energy level in the diet and increase the protein content by 1%-2%. 2. Add 100 grams of choline chloride, 50 grams of methionine and 5 grams of multivitamin, 12 milligrams of vitamin B12, 0.05-0.1 milligrams of selenium per 100 kilograms of feed. 3. The sick chickens were fed separately, each feeding 0.1-0.2 g of choline chloride and 1 mg of vitamin E.