Okla. Stat. tit. 21, § 21-1229: Exhibition livestock - Administration of certain

substances or performance of certain surgical procedures to alter

appearance.

For livestock utilized for exhibition purposes, it shall be

unlawful for any person to inject into the livestock or cause the

livestock to ingest any drug, chemical or substance that is not

labeled for use on animals, or to administer any chemical or

substance used on livestock for the specific purpose of altering the

appearance of livestock or to alter the muscle or fat content of the

animal's carcass or to perform any surgical procedure to alter the

appearance of the livestock. Ordinary and customary veterinarian

procedures, including but not limited to dehorning, branding,

tagging or notching ears, castrating, deworming, vaccinating or

docking the tail of farm animals shall not be prohibited. Surgery

of any kind performed to change the natural contour or appearance of

the animal's body or hide, shall be prohibited by this section. Any

violation of the provisions of this section shall be a misdemeanor,

upon conviction, punishable by a fine of not less than One Thousand

Dollars ($1,000.00), nor more than Ten Thousand Dollars

($10,000.00), or by imprisonment in the county jail for a term not

less than thirty (30) days nor more than one (1) year, or by both

such fine and imprisonment. A second or subsequent violation of the

provisions of this section shall be a Class D1 felony offense, upon

conviction, punishable by a fine of not less than One Thousand

Dollars ($1,000.00), nor more than Ten Thousand Dollars

($10,000.00), or by imprisonment as provided for in subsections B

through F of Section 20N of this title, or by both such fine and

imprisonment.