Reasons for the shallow egg yolk color: 1. Excessive intake of mycotoxins in the feed will reduce the serum pigments and affect the yolk coloration. 2. One-sided increase in calcium content in feed, as the calcium content of the diet can affect pigmentation resulting in lighter colors. 3. Chickens suffering from coccidiosis, salmonellosis, intestinal parasites, etc., will make the yolk color lighter. 4. Feeding chickens with insecticides can also affect the color of the egg yolk. 5. Too much green feed, too little fine material can also cause the egg yolk to become lighter. The measures to prevent the egg yolk color are shallow: 1. Reduce the content of white corn in the feed and try to feed yellow corn. Appropriately reduce the content of vitamin A and calcium in feed. 2. Add 0.3% red pepper powder to the diet. 3. Collect pine needles, rake the leaves, dry, crush, add 5% to 8% to the feed. 4. Carrots, stems and leaves or leftovers are fed, and the amount of feed is 5% to 10% of the diet. 5. Orange peel is dried and crushed and added to the feed in an amount of 2% to 5% of the diet.
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