How can I find pet owners in my area?

I want to distribute coupons and promotional items for my pet care business to pet owners (especially dog owners) in my area. However, it would be a lot more efficient if I knew where to find them. I know there are people who could benefit from pet care who don’t necessarily look where I have previously advertised (online, fliers, business cards, etc.) Ideally I would like to get a list of individual’s who have registered their dogs with the town but I doubt that this is possible. Are there any other ways that I can reach pet owners who aren’t actively in the market for pet care? I’d like them to at least know that my business exists. I’ve been advertising on Craigslist for over a year, as well as local bulletin boards, pet stores, veterinary offices and grooming offices. I’m trying to find out if there’s any way I can target people who aren’t already looking- people who look at classified ads and bulletin boards are already looking.
Dog parks, pet stores, fliers, ads in the paper, etc.