Mo. Rev. Stat. § 322.090
For the purpose of promoting the public health and safety and to prevent the transmission of rabies and to control rabies and to carry into effect the purposes and provisions of sections 322.090 to 322.130, the county commission is hereby empowered to adopt by order, rules and regulations which shall include provisions for licensing, catching, impounding, confinement, redemption and isolation and destruction of dogs; impounding, isolation and destruction of other domestic animals exposed to or infected with rabies; reporting of animals affected with, or suspected of having rabies, or suspected of having been exposed to rabies, or known or suspected of having bitten or attacked a person; confinement, impounding and destruction of dogs displaying vicious propensities; declaration of a quarantine and terms of the quarantine for any portion of such county affected by a rabies epidemic, pursuant to the recommendation of the county health commissioner; the establishment of a schedule of fees and the method for the collection thereof from the licensing, redemption, isolation or confinement and destruction of dogs and other special services for the control of rabies. The county commission shall establish, maintain and operate a county dog pound and shall provide the necessary personnel and facilities to operate the same and shall provide appropriate motor conveyances for the capture of stray or rabid dogs and provide all the facilities necessary to carry into effect the regulations adopted under the provisions of sections 322.090 to 322.130 and shall be authorized to expend county funds for the purposes aforesaid; and shall have authority to contract with any city, town or village within any such county for any of the services, facilities or functions created and established under sections 322.090 to 322.130.
§ 322.090, RSMo