Keep Rover or Fluffy happy, healthy and satisfied while your wallet stays full of green backs with this amazing offer from Hill's Science Diet. They're giving away a free bag of their Hill's Science Diet Ideal Balance dry pet food (up to a $12.99 value) to all that complete a mail-in rebate . Pick up a bag specially formulated for either dogs or cats, fill out the rebate form, include your receipt and the UPC symbol from the packaging, then watch your snail mailbox for the rebate check to arrive. And just to make your life a little simpler, we found this pet food at Petco and it's on sale! Rebate offer ends 12/31/2012 and must be postmarked no later than 01/31/2013.