One month before mating, the ewes are in a state of growth and should not be too fat. Vitamin A, vitamin D, and vitamin E are taken 3 weeks before the start of the breeding period. For the milking ewes, prepare a small tent for salt, supplement a small amount of corn every day. 2 months to 3 weeks before mating into the trial ram, 1 month to 2 months before inoculation with endemic abortion vaccine.
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