You can also get a $1.50 off Purina Cat Chow Healthy Weight Coupon from Target.
Even if the Target Coupon expires beforehand, I know that it has been re-issued a few times. You can just wait it out. Then stack them for some great savings on a 3lb bag.
DON"T WORRY about the offers, I just click no's on the first page, and scroll to the bottom of the second to hit submit & continue. This is only because I am freaky about those kinds of things, your offer should be available once you put in your details!