If your dog liked the free Purina One from Walgreens, head over to Target for some more!
Target is now carrying (well, some stores, not all) the small bags of Purina One smartblend. These are priced at a mere $1.00! There is a Target printable for $1/1 Purina One Smartblend dog food (any size!).
Now this will beep, probably because it is intended for the big bags, but the coupon says any, so if you have a cashier that can read, you should be ok.