The board of county commissioners by ordinance may establish an animal control agency which shall employ at least 1 animal control officer. The board of county commissioners may assign the animal control agency to any existing county department. The animal control agency shall have jurisdiction to enforce this act in any city, village or township which does not have an animal control ordinance. The county's animal control ordinance shall provide for animal control programs, facilities, personnel and necessary expenses incurred in animal control. The ordinance is subject to sections 6 and 30.