http://www.bigdawg-dir.com/Exotic_Animals/Classifieds_and_Advertising/Pet and Animal Directory consisting of common animals and pets from around the world. Quality links and resources are contained inside the Big Dawg Pet and animal directory.Add your links today and help us grow to be the biggest on the web. Classified advertising is a form of advertising which is particularly common in newspapers and other periodicals. A free ads paper is a newspaper containing only classified ads, usually grouped into an extensive set of categories. Classified ads are also among the tools used by many companies in recruitment for available job opportunities.