Pig fighting is a common practice in many pig farms. Pigs that are bitten can cause wound infections if not treated promptly. This infection can cause local inflammation and tissue necrosis, severely affect the pig's health and growth performance, reduce carcass quality, and cause unnecessary economic losses.

Domestic and foreign trials have proved that the main reasons for the abnormal behaviors induced by the captive raising or promoting pig tail biting and ear bite are nutrition, environment and management. This phenomenon is particularly prominent when seasons alternate and the temperature suddenly changes. Therefore, we must take corrective measures to correct it:

1. Balanced nutrition. Nutrition imbalance in the diet can induce the occurrence of this behavior. For example: When the protein content of the diet is low, the protein metabolism of the pig body will be disordered, and it will show some abnormal behaviors, including excitement and biting. When the mineral elements in the diet such as iron, copper, calcium, magnesium and salt are absent or in poor proportions, abnormal performance such as convulsions, intolerance to stress, and increased excitability of neuromuscular may occur, which will also promote mutual biting and fighting. Vitamins are an important component of many metabolic enzymes in the body. When there is a lack of vitamins, the body undergoes metabolic dysfunction, causing abnormal behavior.

2. Optimize the environment. Environmental factors mainly include harmful gases, temperature, and light intensity. When the environmental sanitation conditions in the pig house are poor and the ventilation effect is poor, the accumulation of harmful gases such as ammonia, carbon dioxide, and hydrogen sulfide in the house can cause irritation in the pigs. These stress factors can stimulate tail biting. occur. The high temperature and high humidity in the pig house can easily cause pruritus on the pig's body and can also induce mutual bites. In harsh environments, noise, strong light and other factors can promote stress response and increase fighting in pigs.

3. Strengthen management. If the stocking density is too large, the pigsty space is too narrow, and the pigs are in contact with each other and in conflict with each other, fighting each other for food and drinking. After the group is transferred, the pigs must be familiar with the troughs, sinks, and various facilities within the circle, and establish the order of gregariousness. At this time, the pigs usually perform very lively. Fighting often occurs. In particular, pigs with small body weight are often targeted.

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