Idaho Code § 25-2110
Any person may take up and safely keep any such stallion, mule, ridgeling or jackass found running at large or in his inclosures; and, when so found, must give the owner thereof five (5) days' notice that such animal is in his possession; and if, at the expiration of the aforesaid time, the owner neglects to remove such animal and pay all reasonable charges for keeping the same, then the taker-up must notify the sheriff or any constable, whose duty it is to sell such animal at public auction, on the premises where taken up, after first giving five (5) days' notice of such sale; and the proceeds of such sale must be applied, first, to the fees of the officer making such sale, which are the same as on execution; second, to the payment of the charges of the taker-up of such animal; and the remainder, if there be any, must be paid to the owner of such animal.
Idaho Code § 25-2110