http://www.halopets.com/coupon/ -“plus a printable $5.00 coupon just for signing up. That’s good for a couple FREE cans of Halo” –Store Locator -they also have a box to check if you want to do product testing with them

http://www.bringfido.com/promo/newsletter/ -in the past they’ve had some free magazines and stickers

http://www.petpantrydelivers.com/sample.php

http://www.rileycare.com/mailinglist/subscribe.html

https://www.beneful.com/Dogs-Life/Free-Magazine/Default.aspx