Wyo. Stat. Ann. § 11-29-110

Any person entitled to a lien under this act may enforce the lien by disposing of the livestock animals and other personal property upon which the lien is given, at public auction, upon giving written notice to the owner, if he is known, of the time and place of the disposal, at least five (5) days previous thereto, and by posting three (3) notices of the time and place of the disposal in three (3) public places within the county at least five (5) days previous thereto. If the owner is not known, the notice shall be posted at least ten (10) days previous to the disposal.