This depends on the specific circumstances. In production practice, the ratio of male to female pigs is 1:20 to 30 in the case of natural mating. If the number of breeding sows in small-scale pig farms is small, and there are large-scale breeding farms or breeding boar stations nearby that provide sufficient semen, artificial insemination can be performed on the site. There is no need for specialized breeding of breeding boars. The trial boar can be. Of course, if it is difficult to obtain boar semen from other farms, a certain number of boars, at least one or more, should be kept on the farm, regardless of size, to prevent the use of boars when the sows concentrate on heat, or individual boars. Sudden illness caused special circumstances such as use without boars.
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