Another tip for the thread starter, one I forgot to mention in my first post.
When scouting locations, while it may be nice to have your own lot with a nice big parking lot and landscaping, etc. it's not the best thing for a new startup.
Try to find a nice strip mall setup, and go for a lot that has popular stores that draw people to the lot. Dunkin Donuts, UPS Store, Post Office, A Pizzeria or Chinese Food, Ice Cream Parlor, etc, etc. Being in a supermarket lot cant hurt either

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If possible, try to get a store next to a food place (pizza or Chinese, something slow that people have wait for). Chances are, many people waiting for their order will venture over to the pet shop to "walk around" and many times those walks will wind up turning into sales (and from there, a good chance it becoming returning customers)! Just make sure to keep your stock interesting and setup nice displays so you have something to grab the attention of people who are "Just Looking"

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