It is generally believed that a large dose of iron (150 to 200 milligrams per head) is given to piglets at 3 to 4 days of age to meet the normal growth needs of piglets. Experimental studies have shown that 2 times iron supplementation can significantly improve the disease resistance, survival rate and daily gain of piglets, and the economic benefits are significant. According to calculations, although the iron supplementation at the 2nd time increases the cost of some iron supplementation, the input-output ratio can reach 1 to 20 or more. The method of iron supplementation for 2 times is as follows: The second iron supplementation is performed at 3 days and the dose is still 1 ml. Injection methods are intramuscular injections.
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