The phenomenon of sows killing or eating their own piglets occurs from time to time. The main reasons for analyzing the reasons are as follows: (1) The sows are hungry or malnourished. Long-term feed alone, lack of feeding, lack of protein, minerals, vitamins and other nutrients, coupled with hunger, resulting in sow feeding behavior. This situation is more common in thin old sows or primiparous sows. (2) Sow motherhood is too strong. Sows who have ever eaten a litter of piglets or smelly piglets, or have swallowed a child's birth clothing, miscarried a fetus, and developed a diet. (3) Can't drink water in time. During sow farrowing, high tension, shortness of breath, and loss of fetal water lead to thirsty sows. If water is not added in time, causing the sow to become impatient, biting piglets will occur. (4) Pain and fear. Some of the first-born sows had not seen piglets and thought that the piglets would hurt themselves and have fear. When the sow sees the piglet, she often has large eyes and is ready to attack. Once the piglets are close, they are either killed or bitten. In some cases, the sows are difficult to produce and suffer from pain. Often the pain is vented to the piglets, killing the piglets. Preventive measures: (1) To strengthen the feeding of pregnant sows, diet composition should be diversified to meet the sow's needs for protein, minerals, and vitamins. (2) Do a good job of consignment work so that the sow can leave after the baby is finished and remove the stillbirth and the placenta in time so that the sow will not be swallowed. If some sows need to use the tire clothing to supplement nutrition, they should be cooked and chopped and fed into the feed. (3) Do not string piglets. (4) The sow should drink enough water before giving birth, such as giving birth to a prolonged period of time, and the appropriate amount of warm water can be given in the middle. (5) Sows who bite and lick their throats may wear mouth cages, take them off when they are fed, eat food and then wear them. (6) Weed out sows that have given birth to several consecutive litters. After slaughter of sows, the occurrence of biting is often caused by improper feeding and management or poor motherhood of sows. In the clinical diagnosis and treatment, the author found that 12 cases of postpartum sows bite. The clinical manifestations are: the same day or the second day after the end of sow farrowing, eating, normal spirit, breast full of milk, finger pressure can discharge milk, no mastitis, no other abnormalities. When the piglet approaches the sow and prepares to suck milk, the sow makes a call and raises her head to bite the piglet. When the animal owner first sought medical attention, the author told the owner that the piglets were first smeared with milk or urine of the sow, and the piglets were then placed in the feeding, but the sows were still biting. Then, the owner was asked to bind the sow's limbs and press the head to allow the piglets to eat milk. Then the sows were released and the sows still bit the piglets. At this point, I realized that the sow may have bitten out because of postpartum stress response, so I injected chlorpromazine 5ml intramuscularly to the sow, and put the piglet into the sucker every two hours. At this time, the sow was quiet and let the piglet Breast milk. Analysis: Individual pigs exhibit abnormal performance when subjected to certain abnormal stimuli, including sow farrowing, ie stress responses. The performance of stress response is varied, and it is rare for sows to bite. The use of intramuscular injection of chlorpromazine aims to give sedation and restore its normal neuromodulation, thereby achieving the goal of healing. Disposable Face mask Protective Mask 3Ply Face mask Luck Medical Consumables Co.,LIMITED , https://www.luckmedical.com