It is harmful for laying hens to feed more vitamins.
In order to improve the egg production of hens, some hen breeders increase the amount of vitamins at will, resulting in excessive vitamin disease in laying hens, which affects the growth and laying of laying hens. Laying hens feed added vitamins must be added strictly according to the standard, arbitrarily increasing the dosage will cause harm to laying hens.
The suitable content of vitamin A per kilogram of feed for laying hens is 4000 international units. When the feeding amount exceeds the feeding standard, it can cause excessive vitamin An in hens, such as depression or convulsion, decreased feed intake, do not eat seriously, and feathers fall off.
The optimum content of vitamin D per kilogram of feed for laying hens is 500 IU. When the feeding amount exceeds the feeding standard, it can transfer a large amount of calcium from the bone tissue of laying hens, promote the absorption of calcium in the gastrointestinal tract, and increase the concentration of blood calcium. Calcium deposits in arterial walls, joints, renal tubules, heart and other soft tissues, clinical manifestations are loss of appetite, diarrhea, kidney stones, laying hens often die of uremia.
The suitable content of vitamin E per kilogram of feed for laying hens is 5 international units. Excessive feeding will cause fat metabolism disturbance in laying hens, resulting in overweight or poisoning death.
The optimum content of vitamin K per kilogram of feed for vitamin K laying hens is 0.5 mg. When fed too much, because it stimulates inflammation of gastrointestinal mucosa, chickens show a sharp loss of appetite and dysentery, resulting in a decrease in egg production and suspension of production in severe cases.
The prevention of vitamin excess in laying hens mainly lies in the prevention and reasonable preparation of chicken diets according to the feeding standards. For sick chickens, they should immediately stop feeding vitamins and provide adequate drinking water, which can generally recover gradually within 2 weeks. Wang Yanjuan
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