Have you ever checked out their pet section???
OMIGOSH...
I was just there looking for a new cage for my bird... Here's an example from today's listing:
http://jacksonville.craigslist.org/pet/1013489051.html

It is like soap opera. If you ever happen to be looking for soap opera and can't find a channel on TV that shows it, just go to http://jacksonville.craigslist.org/pet

and start scanning down until you find a good cat-fight. Usually, they preface their listings with RE: .