1. Incidence On April 12, 2012, two groups of weaned sika deer at a farm in Lijin County, Dongying City developed severe diarrhea. The owner of the group used sulfadiazine sodium, ampicillin, enrofloxacin, and dexamethasone for treatment and used oral rehydration solution. Salt and vitamin C adjuvant therapy. After 2 days of routine treatment with antibiotics, there was no clinical effect and 43 deaths were continued. On April 14, 2012, I went to the animal hospital. After inquiring about the morbidity and treatment status, the author conducted a bacteriological and pathological comprehensive diagnosis of 8 of the dead deer cervus cervus. The final diagnosis was metabolic dyschemia caused by high malnutrition and stimulated the symptoms of ascites and diarrhea. With the gradual improvement of the feeding and management environment and the improvement of feed nutrient levels, sick sika deer ate in addition to the initial death of individual treatment, the rest did not cure. 2. Clinical symptoms Mainly manifested as loose stools, tangible fecal particles are often absent, and the anus is filthy. The body temperature is basically normal at 38-39°C; the breathing is relatively stable and the frequency is relatively normal. Diseased deer's appetite has subsided, its degree of decline is related to the degree of diarrhea, the more severe the diarrhea, the worse the appetite. Sick deer gait, less active, often stand alone, hairy unkempt, young deer growth is slow, poor nutritional status. 3. Pathological changes (1) Diseased deer necropsy: Muscle relaxation is inelastic and there is no accumulation of fat. The blood is thin, pale red, and hard to coagulate. Infiltrative edema can be seen subcutaneously. Abdominal cavity has a lot of fluid, pale yellow, a touch of a touch of astringent, exposed to the air can form a semi-solid state. The liver is reduced in size, soft in texture, sharp and thin in the edges, almost shrinking in the liver's capsular and light in color, almost khaki. The intestinal tract is empty and there is almost no content. The intestinal wall is thin and the intestinal mucosa is easily peeled off. The spleen and kidneys have hemorrhagic changes, the color fades, and the texture is soft. Pulmonary function is normal, myocardium is weak and the heart wall is thin. (2) Microscopic examination: The liver, heart, spleen and kidney tissues of the lesions were taken for microscopy. The most obvious changes were severe degeneration of hepatocytes, irregular shape, steatosis, and necrosis. Severe hepatocytes disintegrated and disappeared. Cell debris was observed. Instead, it is a phenomenon of congestion and hemorrhage, or coagulative necrosis of hepatocytes can be seen, the nuclear concentration, eosinophilic cytoplasm. The lesions may start from the center of the hepatic lobule. The hepatic cells in the central area are necrotic, and blood stasis or hemorrhage occurs. Cell debris and fat droplets are found outside the leaflets. Some visible fibrous tissue extensively spread and surround the hepatic lobules. Although the heart, spleen, kidney, etc. in the appearance of varying degrees in volume and texture, but its tissue section under the microscope did not find obvious pathological damage, only occasionally found in the spleen and kidney mild bleeding phenomenon. Thinning of the intestinal wall, shedding or missing chorion. 4. Nutrition survey Because of the lack of feed reserves, the poor quality of management staff and technicians, and the lack of management, the farm is only feeding comminuted corn stalks to newly weaned sika deer, and these corns have different degrees of mildew. Without adding any concentrate, the deer's constitution is thin, the coat is rough, the abdominal circumference is enlarged, and the retina is pale. Through feed analysis, it was found that there was a serious shortage of protein in feed, minerals and vitamins were also less, hemoglobin content was decreased, the number of red blood cells was also lower than normal, and the white blood cell count was slightly lower than normal, but the classification ratio was basically normal. 5. Control measures After comprehensive analysis, it was determined that the spotted deer is malnourished.治疗Treatment and prevention through strengthening feeding management and strengthening nutrition. (1) Control the temperature, humidity, and ventilation of the housing: The deer house temperature will consume a lot of heat energy in the deer body, and the temperature in the deer is kept at about 15°C. Put the sawdust, straw and other litter on the ground in the pen quarters, and the wall gaps should be sealed. Doors and windows should be covered with straw curtains, quilts and other insulation materials. Deer house humidity is suitable for 65% to 75%. While doing a good job in housing temperature and humidity, but also do a good job of ventilation, air freshen the deer house. (2) Immediately change the feed to increase nutrition: According to the nutritional needs of the deer sika deer to provide full-priced feed, increase the amount of protein, vitamins, minerals and trace elements added. In addition, feeding should be conducted regularly, quantitatively, and fixed by breeders, and feeds should not be fed with moldy feeds. Simultaneously with feeding silage, some green hay is added and some fine concentrate is added at night. The pre-diarrhoea phenomenon was aggravated, and 6 larvae died again. It began to improve on the 5th day and was later cured. (3) Keep the deer house quiet, and keep proper light in the deer house: Sika deer is more timid, light can make the deer emotionally stable, increase feed intake, and accelerate the growth of pilose antler. Insufficient natural light, artificial lighting can be added. 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