First, look at the amount of eggs. Egg laying hens at the peak of egg production have a large fluctuation in egg production, indicating that the chickens are unhealthy; when they suddenly drop by 20%, they may be caused by frightened, high-temperature environment or lack of water; if they fall by 40 to 50%, the chickens should be considered whether Suffering from egg drop syndrome or feed poisoning.
Second, look at the eggshell. The appearance of abnormal eggshells, such as soft shelled eggs and thin shelled eggs, is mostly caused by lack of vitamin D3 or inadequate calcium content in feed. Rough egg shells and sand shelled eggs are mostly due to inappropriate proportion of calcium and phosphorus in feed, or calcium. Too much; if the shell is an abnormal white shell or yellow shell, it is caused by the heavy use of tetracycline or some substances with yellow precipitation; the egg shell is changed from white shell to brown shell, so it should be suspected Excessive use, or chickens suffering from infectious diseases such as Newcastle disease or infectious laryngotracheitis.
Third, look at the protein. The protein turns pink, because the content of cottonseed cake in feed is too high, or the iron ion in drinking water is high. Protein thinning is the result of using sulfa drugs or some anthelmintic drugs. Abnormal smell of protein is due to poor absorption and utilization of fishmeal. Proteins have blood spots, plaques, and most of them are inflamed in the fallopian tubes. They secrete too much mucus and are mixed with a small amount of hemoglobin.
Fourth, look at the egg yolk. Egg yolks orange-yellow, high in feed for cottonseed cake or certain pigment substances; gray yolk is the lack of yellow pigment, vitamin A and B vitamins in the diet; greenish yellow, mostly chlorophyllin in the feed; thin egg yolk It is caused by malnutrition in laying hens; odor in egg yolks is caused by feeding fishmeal or other feeds with odor.
Fifth, look at the production time. Under normal circumstances, 70 to 80% of laying hens lay eggs before 12 o’clock noon, and the remaining 20 to 30% are produced before 2 to 4 o'clock in the afternoon. If it is found that chickens have uneven egg production time, even if they have nocturnal eggs, they are all abnormal performances. This indicates that chickens have already had chicken disease. Observe carefully to find the diseased chickens in time.
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