In order to boost egg production in hens, some poultry farmers may increase the vitamin content in their feed. However, excessive vitamins can lead to hypervitaminosis, which negatively affects both growth and egg-laying performance. It's crucial to follow recommended vitamin levels strictly, as over-supplementation can be harmful and even fatal to laying hens.
For vitamin A, the appropriate level in feed is 4,000 international units per kilogram. Exceeding this amount can cause hypervitaminosis A, leading to symptoms such as depression, convulsions, reduced feed intake, and in severe cases, loss of appetite and feather loss.
Vitamin D should be provided at a rate of 500 international units per kilogram of feed. Overfeeding can result in excessive calcium mobilization from bones, increased intestinal absorption of calcium, and elevated blood calcium levels. This can lead to calcification in soft tissues like the arteries, joints, kidneys, and heart, causing symptoms such as loss of appetite, diarrhea, kidney stones, and potentially death from uremia.
The recommended amount of vitamin E is 5 international units per kilogram of feed. Too much vitamin E can disrupt fat metabolism, leading to severe health issues, including fat accumulation or poisoning, which may result in death.
For vitamin K, the ideal level is 0.5 mg per kilogram of feed. Excessive amounts can irritate the gastrointestinal tract, causing loss of appetite, lethargy, and a drop in egg production. In severe cases, it may even lead to complete cessation of egg-laying.
Proper vitamin management is essential for maintaining the health and productivity of laying hens. Always consult with a veterinarian or nutritionist to ensure that your feeding program meets the specific needs of your flock without exceeding safe limits.
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