free 5-lb bag of Hills Science Diet Light pet food with mail-in rebate (up to $13.99). Purchase must be made by 4/30/12. it says you can not use coupons... but if you are buy a lot of other things, I am certain they wont know what you used a coupon on and you can always debate it, photocopy everything you send and watch for the return date to show up to make sure you got it (rule of thumb for any rebate)
*I would MAKE SURE that the bag is not marked down or on sale!! Fine print excludes that too and that would be reflected on the receipt.