Wound infection endangers the prevention and treatment of mutual bite among pig herds

Pigs bite each other, also known as "anti-discomfort syndrome". Any uncomfortable environmental factors can cause pigs to bite each other. Light pigs have half of their tails left, heavy ones bite off all of them, and some pigs bite their ears. This phenomenon often occurs at feeding time, bitten pigs often hide in the corner, if not timely treatment, can cause wound infection. This infection can cause local inflammation and tissue necrosis in pigs and reduce carcass quality. The tail bite and ear bite of pigs can be caused by a variety of reasons, therefore, measures must be taken to prevent and cure them.

Pig herd

The main results are as follows: (1) Nutrition: under the condition of house feeding, all kinds of nutrients needed for pig growth depend on feed supply. when feed nutrition is deficient, pigs are stressed and bite each other. For example, the nutritional level of feed is lower than the standard value; feed matching is unscientific; in the early fattening period, the quality of protein in feed is poor; vitamin, iron, copper, calcium, magnesium, salt deficiency and cellulose deficiency and so on.

(2) Environment: the pig house has poor environmental hygiene, high concentration of harmful gases such as ammonia, carbon dioxide and hydrogen sulfide, too high or too low temperature, and the decrease of ventilation speed makes pigs uncomfortable or do not rest well. In harsh environments, too much light can also lead to addiction in pigs.

(3) Management: the feeding density is too high, pigs come into contact with each other, conflict occurs, and bite each other for the position of feeding and drinking water. The weight of a column of pigs varies greatly, and small and weak pigs are often bitten. Once bitten, it will cause all pigs to bite. Insufficient feeding trough or insufficient drinking water often lead to outbreaks of bite fights.

(4) Disease: external parasites can become additional stress. External parasites irritate pigs caused by skin irritation, friction on the walls and bars in the house, trauma, causing other pigs to bite. Parasites in the body: such as Ascaris lumbricoides, can also bite the tail, to timely deworming. Pig anemia and tail tip necrosis can also induce pig tail bite and ear bite. in addition, it also bites ribs and other parts, such as hooves, legs, neck and tarsal joints.

(5) ordering bite fight: in order to make full use of pig pens, the social order of the original pig herd is destroyed (such as the merger of two columns of piglets, there are two first order), and a new order needs to be established. Especially in eating, sleeping, biting and fighting for order, once the new order is established, it will calm down.

To prevent pig bites, we can start with the following aspects:

(1) to meet the nutritional needs of pigs and feed with full price feed. When it is found that there is a tail bite, you can add an appropriate amount of compound vitamins and minerals in the feed, feed regular and quantitative, and it is strictly forbidden to feed mildew abortive feed. (2) reasonable grouping and raising pigs with similar breeds, body weight, physique and feed intake in the same circle. (3) the feeding density should be appropriate to ensure that each pig has sufficient floor space, such as 3-4-month-old pigs, accounting for 0.5-0.6 square meters. (4) the environment is well ventilated, insulated, moistureproof and properly illuminated to ensure that the house is hygienic, dry and well ventilated. (5) tail amputation of piglets: piglets born 1 or 2 days old can be amputated. According to the data, after the tail is severed, only 0.25% of the tail bites occur, while the incidence of unsevered tail is 6.86%, with a difference of 27 times. Methods: the caudal bone and caudal muscle were cut off with steel wire forceps at a distance of about 1/3 from the caudal root. The blood vessels and nerves were compressed and the skin was pressed into a groove. After about 10 days, the tail bone and caudal muscle could be removed. This method has no bleeding and no inflammation, and the effect is very good. (6) the bitten pig should be dealt with in time: rinse and disinfect with 0.1% potassium permanganate and apply iodine or ferrous chloride solution to prevent suppuration. Pigs with severe bites can be treated with antibiotics.