[gadaboutgal]

If the Sumter County law applied to cats, it would state so specifically. Laws are not written to be ambiguous. Marion County's law specifically states dogs and cats.
And, no, I personally do not believe an owner should allow its cat to roam freely, but I do wish people would stop spreading erroneous information.
(p.s. referring to "common sense" makes no sense and implies a very negative conotation regarding someone else's ideas and opinions-I'm sure you did not mean to be that rude.)