According to the change of eggs, judge the shortage in feed preparation

If the eggshell is found to be non-pressure-resistant and easily broken, there are permanent marble spots on the shells and accompanied by fleas in the hens, indicating lack of manganese in the feed. Manganese supplements can be added to manganese sulfate or manganese oxide feed, so that the feed contains 30 mg of manganese per kilogram on it. It is important to note that excessive manganese sulfate in the diet or unreasonable premixing process may cause damage to vitamin D and adverse absorption of calcium and phosphorus.

When the egg white of the egg becomes thin and the edible portion has a fishy smell, check whether the proportion of the rapeseed cake or fish meal in the feed is too large. Rapeseed cake contains sulfur glucoside, a toxic substance. If it exceeds 8%-10% in feed, it may cause brown shell eggs to have a fishy smell, with the exception of white shell eggs. When the fish meal in the feed, especially the low-grade fish meal, exceeds 10%, both the brown shell and the white shell egg may have a fishy smell. The amount of rapeseed cake and fishmeal should be limited in the feed, usually the former should be within 6% and the latter should be below 10%. Decocted rapeseed cake can increase the mix ratio.

After the eggs are chilled, the egg whites appear pink, and the yolks expand in size. The texture becomes hard and elastic. It is commonly known as the "Eraser", which appears pale green to dark brown, sometimes with pink or red spots. This phenomenon occurs with cottonseeds. The quality of the cake is related to the proportion of the cake. The cyclopropene fatty acid in the cottonseed cake can turn the egg white into a pink color. The free gossypol can form a darker complex material with the iron in the yolk to promote the yolk to change color and lay eggs. The cottonseed cake in the chicken diet should use less poisonous varieties, and the proportion should be within 7%.

The egg white is thin and the boundary between the dense protein layer and the thin protein layer is unclear, indicating that the protein or vitamin B2, VD in the hen's feed is insufficient, and the nutrients in the feed formula should be checked and supplemented according to the actual lack of nutrients.

If there are sesame to soybean-sized blood spots, blood clots, or reddish blood in the egg white, the lack of vitamin K in the diet is also an important factor in addition to the rupture of the microvessels in the ovaries or fallopian tubes.

The color of the egg yolk becomes lighter. Usually, the diet containing more lutein can deepen the yolk color, and the lack of lutein can make the yolk color fade. Yellow corn seed contains zeaxanthin, which can also deepen the color of the egg yolk. However, white corn and other seed solid feeds can not color the yolk due to lack of this pigment.

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