Florissant, MO Animal Ordinances: Dog Leash Laws (2026)

360 keeping permit, to keep that animal on the owner's or custodian's premises. An animal found off those premises is running at large, and conviction triggers an escalating minimum fine within any rolling twelve-month period: twenty-five dollars for a first offense, fifty dollars for a second, seventy-five dollars for a third, one hundred dollars for a fourth, and a minimum of five hundred dollars for a fifth or any later offense in that window. The count resets, so a full year without another offense means the next citation is again treated as a first offense with the twenty-five-dollar minimum.

Even on the owner's own property, Subsection B requires an animal left loose outdoors to be accompanied by a responsible adult capable of verbally controlling it, or otherwise physically restrained behind a visible fence or on a chain, cable or rope substantial enough to hold it. Subsection C allows an electronic 'Invisible Fence' containment system as an alternative restraint, provided it does not extend past the front building line and any required warning sign, sized by the Health Department, measures no smaller than six by eight inches and no larger than four square feet. 250.