Okla. Stat. tit. 4 § 43
The board of county commissioners of any county with a population of two hundred thousand (200,000) or more according to the last Federal Decennial Census may regulate or prohibit the running at large of dogs within said county, and cause such dogs as may be running at large to be impounded and disposed of as otherwise provided for by law or sold to discharge the costs and penalties provided for the violation of such prohibition and the expense of impounding and keeping the same for such sale; and may also provide for the erection of all needful pens, pounds and buildings for the use of said county at any place within said county. It shall be the duty of the board of county commissioners of any county undertaking the regulation and taxation of dogs in said county under this act to establish and enforce rules governing the same, and they shall enter into a definite cooperative agreement with the sheriff of said county prescribing said rules and regulations and the manner and terms of enforcement thereof, and for the financing and compensation therefor. The board of county commissioners may also regulate and provide for taxing the owners and harborers of dogs, and authorize the humane killing or disposal of dogs, found at large, contrary to any ordinance regulating the same. Any person, firm or corporation who violates any rule or regulation made by such board of county commissioners under the authority of this act shall be guilty of a misdemeanor and shall be punished as provided by the laws of this state in any court of competent jurisdiction, provided that in the case of continuing offenses, each day on which the offense occurs shall constitute a separate offense.
Okla. Stat. tit. 4, § 43