1, improper feeding and management. Duck dung is not removed in time. Fermentation produces harmful substances such as toxins and ammonia. It stimulates the skin on the surface of the duck to be itchy. Confinement, feathers, and contamination can also lead to self-deficit and turn to each other.
2, lack of nutrition. The proportion of dietary nutrition is unreasonable, resulting in insufficient protein content or lack of sulfur-containing amino acids, lack of inorganic salts, vitamins, or lack of salt for a long period of time. Feeding time is not fixed and is full of hunger. In addition, depilation caused by the lack of cobalt is also prone to induce feathering.
3. Parasitic Infections: Parasite infections on some body surfaces can also cause itching and cause paralysis.
4, poor environmental conditions. If the stocking density is too large, lack of exercise, overheating, and excessive humidity, the ventilation of the housing is poor, the concentration of ammonia gas and carbon dioxide exceeds the tolerance of the duck population, the light intensity is too strong, the light and shade distribution is uneven, or the light color is not suitable.
5, mosquito bites. Summer mosquitoes, flies, etc., multiply, and bite the meat duck to make it itch and cause spasm. Because the big hairs at the tip of the duck's wings just started to grow around the age of 24 days, the site was most severely affected by hemorrhoids, causing bleeding and damage to hair follicles.
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