Pet Business marketing is an example of this. There are so many pet businesses now that it's possible to run a successful marketing business that caters to the needs of pet-business owners exclusively. FWV Fetching, for instance, provides everything from blogging placement and social media to trade show campaigns exclusively for pet businesses.

Such a business could also supply pet-related services as well, such as dog grooming. Picture an in-house "dog spa," for example, surrounded by products for sale. The key to success for many small businesses is to find and fill a niche market. Pet-business marketing is an example of this.