Wyo. Stat. § 11-30-113: Unlawful cutting of ears of sheep.

(a) It is unlawful for any person willfully to cut, sever, detach or mutilate more than one-half (1/2) of either ear of any sheep or to unlawfully have in his possession or under his control any sheep which have more than one-half (1/2) of either ear removed or mutilated unless the same are so described in a bill of sale or other certificate of title covering the sheep. Sheep afflicted by bighead are exempt from the provisions of this section.

(b) Any person who violates the provisions of subsection (a) of this section is guilty of a felony punishable by imprisonment for not more than five (5) years.