PetSmart deal scenario:
Buy 1 Science Diet dog treats (14.1 oz packages) on sale for 2 for $4.99 (with PetPerks card)FINAL COST: FREE + Possible $0.50 Overage! (Overage would be towards other items in your purchase or you may just wanted to see if they will adjust the price down!)
Yay! Let us know if it works for you!
(Offer good thru 6/21/10)
(Thanks @bargainblessings)