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Milk sow formula: 66.5% corn, 10% soybean cake, peanut cake 10%, wheat bran 8%, fish meal 3%, bone meal 1.3%, shell powder 0.7%, salt 0.5%, plus a variety of vitamins. Applicable to postpartum 1--20 days of sow: corn 67%, wheat bran 8%, peanut cake 10%, bean cake 12%, bone meal 1.7%, shell powder 0.8%, salt 0.5%, plus oxytetracycline, Multidimensional. Applicable to 20-30 days postpartum lactating sows: corn 38%, soybean cake 25%, wheat bran 10%, sorghum 25%, shell powder 1.4%, salt 0.6%, green feed 2.94%.