Some pig farmers purchase piglets from other places. Due to the lack of necessary knowledge about breeding, they often take a bad job in the early stage of raising pigs, and even lose out. Therefore, it is particularly important to do a good job of pre-nursing for newly-weaned piglets. I. Physiological characteristics of weaned piglets 1. Low immunity: After birth, newborn piglets acquire maternal antibodies through breastfeeding. Their antibody levels peak in 10-15 days, and then gradually decline until the time of weaning, the antibody levels are lower. 2, digestive insufficiency. When the piglets are weaned, the digestive organs have not yet fully developed, and the secretion of digestive enzymes in the body is insufficient, so the digestive function is incomplete. 3, poor body temperature regulation. Because the body temperature regulation center of piglets is not fully developed at this time, the body temperature regulation ability of weaned piglets is poor, together with thin skin, thin skin, less subcutaneous fat, and large surface heat dissipation area; normal body temperature is also higher than that of adult pigs, which increases the temperature difference from the external environment. , making it less resistant to cold. Second, buy piglets should pay attention to the problem. Observed from the naked eye, should be selected hair smooth and smooth, ruddy skin, eyes are God, responsive, strong piglets; small purchase, you should choose the same individual in the nest. To understand the epidemic situation and immunization status of piglets and provide basis for feeding and management and disease prevention of piglets in the future. Third, the precautions in the transportation process. Before transport, in order to reduce the stress response of piglets, vitamin C raw powder can be used to mix or electrolyze multidimensional drinking water. During transport, pay attention to heat preservation, weather protection, rain and wind, and pay attention to the daily temperature difference (when the car is transported, it is advised to stop at the middle of the night, especially when the temperature is low). Fourth, the first week of care after purchase to 1-2 days, pay attention to rehydration, especially long-distance transporters, oral rehydration salts should be. Reasonable grouping is similar to the weight of piglets in the same group (the difference between the maximum and minimum should not exceed 2.5 kg), and the density should be 10-12 heads/field. After the column, no special circumstances, generally no longer change, take the same with the same; limit feeding, feed to 78% satiety, to prevent the occurrence of gastrointestinal diseases. For 3-5 days, appropriate amount of drugs should be added during feeding to prevent the occurrence of digestive tract and respiratory diseases. Commonly used antibiotics include oxytetracycline 300-400 g/kg, chlortetracycline 250-300 mg/kg, and sulfamafamilone 150-200 mg/kg; at the same time, equal amount of baking soda must be added to alkalinize urine to prevent kidney disease. Damage; Tiamulin, nitrofluoline, formazan, Chinese herbal medicine, etc. can also be added, but the relatively high price of such drugs will increase the cost of breeding. 5-7 days, pay attention to vaccinated swine fever vaccine, the most appropriate amount of 4-5 heads / head. Within 3 days after vaccination, if there are some pathological symptoms, appropriate antibiotic preparations may be added to the diet, but avoid using compound Chinese herbal preparations and antiviral powder to avoid affecting the immune effect.