Newborn calves can get enough iron from their mothers' milk and usually don't suffer from anemia. But with the growth of calves, the iron provided by breast milk can no longer meet the needs of calves. Calves are more sensitive than Daniel, prone to anemia, dysentery, anorexia and mild diarrhea. In view of the increasing trade volume of cattle in recent two years, the breeding enthusiasm of rural cattle farmers has been continuously improved and they have begun to pursue immediate interests. Cattle are raised under various conditions that do not conform to the feeding standard of dairy cows, such as being too small, too old and too weak. In view of this situation, we adopted the method of intravenous drip of whole calf blood for physical rehabilitation treatment, which achieved obvious results, greatly improved the survival rate of calves and reduced the treatment cost.

After eliminating symptoms such as weakness, difficulty in standing, and inability to eat milk caused by inflammatory factors, determine whether it is a premature calf, a malnourished calf or an immature calf according to the body hair, and ask the owner. In the actual use of blood transfusion therapy, combined with antibiotics, subsidies, calcium, potassium and other treatment methods, calves have been intravenous infusion, generally effective once. Patients with severe symptoms may lose treatment again the next day. Usually they lose twice and basically return to normal. Blood transfusion therapy can directly increase the blood volume of calves, make up for the deficiency of hematopoietic function of calves, supplement maternal antibodies, enhance disease resistance, nourish the whole body, have a direct impact on calf regeneration, and greatly reduce the treatment cost.

The main method to treat selenium deficiency in calves is to supplement selenium artificially during calf feeding. It should be supplemented regularly in different growth periods, such as intramuscular injection, oral administration and drinking water. In recent years, due to the rising price of finished food, more and more cattle farms use self-made food as food. Long-term consumption of self-made food will cause nutritional imbalance in calves.

In the long run, it may lead to selenium deficiency and increase the incidence of selenium deficiency in calves. Selenium is a trace element needed by animals. Calves grow faster and need enough selenium to develop. The lack of selenium in diet will lead to many symptoms, such as metabolic diseases characterized by degeneration and necrosis of myocardium and bones.