Idaho Code § 25-2111
If the owner or claimant of any stallion, ridgeling, unaltered male mule or jackass be unknown, the taker-up must give ten (10) days' notice, with the description of the animal or animals, its marks or brands, by posting up at least three (3) written or printed notices in at least three (3) conspicuous places in the county, calling upon the owner to claim the property; and if, at the expiration of the ten (10) days, the owner neglects to remove such animal or animals and pay all costs, then the taker-up shall call on the sheriff or any constable of the county to sell such animal or animals; and after deducting the fees of the officer making such sale and the reasonable charges of the taker-up, the balance, if any there be, shall be paid into the county treasury, to be applied to the county school fund.
Idaho Code § 25-2111