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 19 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, the author realized that the sow may have bitten out due to postpartum stress, so 5 ml of chlorpromazine was injected intramuscularly to the sow, and the piglet was put into the sucker every two hours. The sow was quiet at this time. Piglets suck milk. Other cases since then, the author treated with the law, can receive satisfactory results.
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.
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